EP3965434A1 - Method for improved sonication of a plurality of sonication areas - Google Patents
Method for improved sonication of a plurality of sonication areas Download PDFInfo
- Publication number
- EP3965434A1 EP3965434A1 EP21194383.2A EP21194383A EP3965434A1 EP 3965434 A1 EP3965434 A1 EP 3965434A1 EP 21194383 A EP21194383 A EP 21194383A EP 3965434 A1 EP3965434 A1 EP 3965434A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sound reinforcement
- signal processing
- processing device
- sound
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 21
- 238000000527 sonication Methods 0.000 title 2
- 230000002787 reinforcement Effects 0.000 claims description 63
- 230000005236 sound signal Effects 0.000 claims description 47
- 230000006870 function Effects 0.000 claims description 19
- 230000000873 masking effect Effects 0.000 claims description 17
- 230000001629 suppression Effects 0.000 claims description 10
- 230000005284 excitation Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/1752—Masking
- G10K11/1754—Speech masking
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17815—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the reference signals and the error signals, i.e. primary path
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1281—Aircraft, e.g. spacecraft, airplane or helicopter
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1282—Automobiles
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3023—Estimation of noise, e.g. on error signals
- G10K2210/30232—Transfer functions, e.g. impulse response
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3212—Actuator details, e.g. composition or microstructure
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3221—Headrests, seats or the like, for personal ANC systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
- H04R2227/001—Adaptation of signal processing in PA systems in dependence of presence of noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
- H04R2227/009—Signal processing in [PA] systems to enhance the speech intelligibility
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/03—Synergistic effects of band splitting and sub-band processing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Definitions
- the invention relates to a method according to the preamble of claim 1.
- the invention is based on the object of proposing a method and a public address system with which an improved and/or more cost-effective and/or more efficient and/or more effective public address system for a plurality of public address stations can be provided.
- the signal processing unit preferably has at least one sound processor unit and in particular at least one additional microprocessor.
- a masking signal is preferably understood to mean noise or an additional sound signal, which is superimposed on the useful signal by means of the compensation signal and reduces the perception or perceptibility of an interference signal Frequency band or group of frequencies comprising at least one significant frequency or frequency band of the interfering signal or adjacent thereto in terms of spectrum.
- At least one of the sound reinforcement stations has an operating element with which the volume of the playback can be adjusted by the sound generating device of the sound reinforcement station, in particular within defined limits, a minimum volume and/or maximum volume.
- the noise suppression signal for a sound reinforcement station prefferably be generated/calculated as a function of the useful signals and the microphone output signals of the other sound reinforcement stations and in particular an acoustic transfer function between two or more or two sound reinforcement stations each.
- the noise suppression signal is preferably calculated in the audio signal processing device for at least one sound reinforcement station and made available by means of the compensation signal.
- the usable part of the audio signal processing device required for the respective sound reinforcement station is in each case or at least a case is arranged in or at the sound reinforcement station structurally separate from the rest of the audio signal processing device.
- a target criterion is preferably understood to be a value of a direct or indirect measured variable, such as a characteristic value extracted from a measured signal.
- the target criterion is based in particular on the characteristic values of the speech intelligibility index or the listening threshold.
- a target criterion speech intelligibility index can be used for a public address station to ensure the speech intelligibility of a telephone call made at this public address station.
- a target criterion speech intelligibility index can be used, for example, to prevent the speech intelligibility of a telephone call at another PA station for one's own PA station, in order to ensure privacy.
- a target criterion implemented, for example, by means of a listening threshold, it can be ensured that a music signal presented at a PA station always exceeds the listening threshold determined from existing interference signals, in order to ensure that no information loss occurs during the music performance.
- adjustments to the amplitudes of the can expediently presented signals at the PA stations, the use of masking signals or the use of noise suppression signals.
- At least one or both or all of the sound reinforcement positions have a chair, in particular for sound reproduction, which has a backrest surface or backrest surface and a headrest surface and has at least a first and a second actuator for exciting vibrations, with each of these two actuators in is arranged in the stalls, so that the first and second actuators are each arranged with their excitation surface on the inside of a covering of the headrest surface or the inside of a covering of the backrest surface at essentially the same height.
- the sound reinforcement station preferably comprises the seating of a sound reinforcement arrangement, in particular including the environment acoustically directly surrounding or enveloping the person using the seating.
- the method and the public address system are preferably designed in such a way that emergency signals or warning signals, in particular from authorities, are not extinguished or masked if they are identified in the audio signal processing device as background noise by means of a microphone output signal.
- the audio signal processing device is preferably designed as a central unit for all sound reinforcement stations.
- the audio signal processing device is integrated in a single or multiple control devices and/or is implemented by software.
- This/s control unit(s) can otherwise have other functions or primarily other functions; in particular, this can be a single central control unit of a motor vehicle.
- the actuator preferably has an electrical drive for converting electrical signals into mechanical deflections or mechanical vibrations.
- the drive has a coil through which the current of the electrical signal can or does flow and has a permanent magnet which can or does interact electromagnetically with the coil
- the actuator also has a housing with an excitation surface, wherein the housing and/or the excitation surface can be mechanically deflected by the electric drive and/or can be or is mechanically excited to vibrate and can emit acoustic sound signals in the process.
- the electrical signals through the coil expediently have the information of the sound signal to be radiated or the useful signal and/or the compensation signal, in particular a music signal and/or speech signal.
- the actuator is designed to emit acoustic sound and/or is designed in such a way that the actuator excites or can excite its excitation surface and thus a connected body to vibrate its body structure, as a result of which the flat body surrounded by air emits sound waves .
- the method and the public address arrangement are preferably designed for use in motor vehicles, in particular automobiles or buses, alternatively preferably for use in airplanes or ships/boats.
- figure 1 shows an example of a basic representation of the public address systems A, B, C of the public address system networked via the audio signal processing device 1 .
- the useful signals S are exchanged or made available to the sound reinforcement stations A, B, C by means of the central audio signal processing device 1 .
- the sound emitted by the adjacent acoustic irradiation positions becomes "known background noise", ie for the known background noise N.
- Public address stations that are not occupied by people, here for example public address station D, are deactivated, for example, in order to reduce the computing effort for the audio signal processing device 1.
- the audio signal processing device 1 also provides the sound generating device of each public address station A, B, C with a compensation signal K in addition to the useful signal S, this compensation signal K for each public address station A, B, C in the audio signal processing device 1 depending on a cumulative interference signal ⁇ N of the respective public address station and of the useful signal S of the corresponding public address station is calculated and made available to the respective public address station A, B, C.
- the cumulative interference signal ⁇ N is made up of the known interference signal N from the neighboring PA stations and an unknown interference signal Nuk.
- the cumulative interference signal ⁇ N is recorded by means of a microphone for each sound reinforcement station A, B, C, for example, and the cumulative interference signal ⁇ N is thus made available to the audio signal processing device 1 as a microphone output signal.
- Public address station A has, for example, like each of the public address stations, an audio output unit 3 which, for example, includes a loudspeaker unit, but can also have a connection for headphones or for other devices capable of audio output.
- an audio output unit 3 which, for example, includes a loudspeaker unit, but can also have a connection for headphones or for other devices capable of audio output.
- a classification of the signal desired by the user decides on the later measures to influence the sound at your own sound reinforcement station A (passenger A) and at the other PA places B, C (passenger B + C).
- pure speech signals can be adjusted more strongly than qualitatively demanding music signals, this is done within the framework of a classification 4 of one's own useful signal.
- a listening threshold M can be calculated 7, with a previous analysis 5 of the unknown interference noise Nuk and with a previous analysis 6 of the others , known interference signals N.
- the listening threshold M is used as the basis for the adjustment of the following control option A and/or regulation option B.
- option A after the target/actual comparison 9 for the set target values or target criterion 8, a decision is made as to whether or not the useful signal S must be adjusted in terms of speech intelligibility/influencing listeners, etc. 10.
- the useful signal 10 is accordingly direct output or optimized, after a calculation of an adjusted useful signal 11 output.
- option B a useful signal is first estimated 12 that withstands the target/actual comparison, and the output of the signal is then continuously re-evaluated in the control loop and adjusted if necessary.
- this adjusted useful signal S is output, after which sensing is carried out using a microphone 3 .
- a comparison 9 of the target criterion 8 such as a minimum Speech intelligibility index STI carried out. It is checked whether the target criterion has been reached 10. If it is reached, the useful signal continues to be output. In the event that the target criterion was not met, a calculation 11 of the newly adapted useful signal is carried out and this is then output.
- FIG. 4 shows as an example the schematic structure of the algorithm of the method for needs-based masking / noise suppression or noise canceling (passengers B + C + 7):
- this now relates to seat position B, where the telephone call from position A, for example, should not be understandable .
- a listening threshold M is calculated from the unknown Nuk and known N interference signals 7, with prior analysis 5 of the unknown interference noise Nuk and with prior analysis 6 of the other, known interference signals N.
- the listening threshold M serves as the basis for a target/actual comparison 9 with at least one target criterion 8.
- the algorithm first evaluates whether a useful signal is required and, if so, whether this is sufficient to mask the external signals 13. If a useful signal is required at position B and this satisfies the target criterion 10 e.g. a telephone call from passenger A cannot be understood, the signal S is output and is still checked in the control circuit using a microphone 3 and, if necessary, readjusted, using an additional actual/target comparison 9 of the target criterion, 10.
- the noise canceling algorithm also known as the ANC algorithm (active noise cancelling) is used to suppress noise and generate a noise canceling signal ANC used for compliance with the target values 14. Then fin det another actual / target comparison 9 takes place with regard to the target criterion 8 by means of the signal sensed by the microphone 3 .
- the nominal target value or target criterion 8 e.g. des minimum speech intelligibility index
- a masking signal M is generated 15 and in this case the speech intelligibility is reduced to the target value.
- the adjusted useful signal is calculated 11 as a function of the generated masking signal M and then the adjusted useful signal S′ is output.
- the tone control of the method after 3 or 4 can alternatively be selected or used simultaneously in the course of the procedure.
- one of the algorithms is implemented with priority and/or weighted.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Quality & Reliability (AREA)
- Computational Linguistics (AREA)
- Otolaryngology (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Verfahren zur Beschallung von mindestens zwei Beschallungsplätzen (A, B, C, D) einer Beschallungsanordnung, wobei jeder Beschallungsplatz (A, B, C, D) mindestens eine Schallerzeugungseinrichtung (3) und jeweils wenigstens ein Mikrophon (2) aufweist,dabei weist die Beschallungsanordnung eine Audiosignalverarbeitungseinrichtung (1) auf, welche zumindest eine Verstärkereinheit und wenigstens eine digitale Signalverarbeitungseinheit aufweist,wobei an dem jeweiligen Beschallungsplatz (A, B, C, D) mittels des Mikrophons (2) akustische Störsignale erfasst werden und das jeweilige Mikrophonausgangssignal (∑N) der Audiosignalverarbeitungseinrichtung (1) bereitgestellt wird, wobei die Audiosignalverarbeitungseinrichtung (1) der Schallerzeugungseinrichtung (3) jedes Beschallungsplatzes (A, B, C, D) ein Nutzsignal (S) und ein Kompensationssignal (K) bereitstellt, wobei dieses Kompensationssignal (K) in der Audiosignalverarbeitungseinrichtung (1) in Abhängigkeit des Mikrophonausgangssignals (∑N) und des Nutzsignals (S) des entsprechenden Beschallungsplatzes (A, B, C, D) erzeugt und/oder berechnet wird.Method for sound reinforcement of at least two sound reinforcement positions (A, B, C, D) of a sound reinforcement arrangement, each sound reinforcement position (A, B, C, D) having at least one sound generating device (3) and at least one microphone (2) in each case, the Public address arrangement has an audio signal processing device (1) which has at least one amplifier unit and at least one digital signal processing unit, acoustic interference signals being detected at the respective public address station (A, B, C, D) by means of the microphone (2) and the respective microphone output signal (∑N ) is provided to the audio signal processing device (1), the audio signal processing device (1) providing the sound generating device (3) of each sound reinforcement station (A, B, C, D) with a useful signal (S) and a compensation signal (K), with this compensation signal (K) in the audio signal processing device (1) depending on the microphone output signal (∑N) un d of the useful signal (S) of the corresponding sound reinforcement station (A, B, C, D) is generated and/or calculated.
Description
Die Erfindung betrifft ein Verfahren gemäß Oberbegriff von Anspruch 1.The invention relates to a method according to the preamble of
Der Erfindung liegt die Aufgabe zu Grunde, ein Verfahren sowie eine Beschallungsanordnung vorzuschlagen, mit welcher eine verbesserte und/oder kostengünstigere und/oder effizientere und/oder effektivere Beschallung mehrerer Beschallungsplätze erfolgen kann.The invention is based on the object of proposing a method and a public address system with which an improved and/or more cost-effective and/or more efficient and/or more effective public address system for a plurality of public address stations can be provided.
Diese Aufgabe wird erfindungsgemäß gelöst durch das Verfahren gemäß Anspruch 1 und die Beschallungsanordnung gemäß Anspruch 9.This object is achieved according to the invention by the method according to
Die Signalverarbeitungseinheit weist vorzugsweise wenigstens eine Klangprozessoreinheit sowie insbesondere mindestens einen zusätzlichen Mikroprozessor auf.The signal processing unit preferably has at least one sound processor unit and in particular at least one additional microprocessor.
Es ist bevorzugt, dass in der Audiosignalverarbeitungseinrichtung die Erzeugung des Nutzsignals und/oder des Kompensationssignals für einen Beschallungsplatz oder mehrere Beschallungsplätze in Abhängigkeit wenigstens eines oder mehrerer der folgenden Parameter durchgeführt und/oder berechnet wird:
- eine definierte hinterlegte oder durch die Audiosignalverarbeitungseinrichtung berechnete Mithörschwelle, zur Verringerung des Mithörens zwischen verschiedenen Beschallungsplätzen, und insbesondere das Nutzsignal und das Kompensationssignal für eine oder jeweils für mehrere Beschallungsplätze in Abhängigkeit der Mithörschwelle und bevorzugt einer Übertragungs- und/oder Übersprechfunktion zwischen definierten Beschallungsplätzen durch die Audiosignalverarbeitungseinrichtung berechnet und bereitgestellt wird und/oder
- einen Sprachverständlichkeitsindex, welcher für jeden Beschallungsplatz durch die Audiosignalverarbeitungseinrichtung berechnet wird und insbesondere das Nutzsignal in Abhängigkeit des Sprachverständlichkeitsindex berechnet wird, damit Sprachsignale an dem Beschallungsplatz eine Mindestsprachverständlichkeit aufweisen, und/oder
- ein Geräuschunterdrückungssignal in der Audiosignalverarbeitungseinrichtung für wenigstens einen Beschallungsplatz berechnet wird und mittels des Kompensationssignals bereitgestellt wird und/oder
- ein Maskierungssignal durch die Audiosignalverarbeitungseinrichtung berechnet wird zur Maskierung definierter Geräuschanteile in und/oder an einem Beschallungsplatz.
- a defined, stored listening threshold or one calculated by the audio signal processing device, to reduce listening between different PA stations, and in particular the useful signal and the compensation signal for one or for a plurality of PA stations depending on the listening threshold and preferably a transmission and/or crosstalk function between defined PA stations by the Audio signal processing device is calculated and provided and / or
- a speech intelligibility index, which is calculated for each sound reinforcement station by the audio signal processing device and in particular the useful signal is calculated as a function of the speech intelligibility index, so that speech signals at the sound reinforcement station have a minimum speech intelligibility, and/or
- a noise suppression signal is calculated in the audio signal processing device for at least one sound reinforcement station and is provided by means of the compensation signal and/or
- a masking signal is calculated by the audio signal processing device for masking defined noise components in and/or at a sound reinforcement station.
Unter einem Maskierungssignal wird vorzugsweise ein Rauschen oder ein Zusatzklangsignal verstanden, das dem Nutzsignal mittels des Kompensationssignals überlagert wird und die Wahrnehmung bzw. Wahrnehmbarkeit eines Störsignals vermindert, dabei weist das Maskierungssignal insbesondere die akustische Information eines anderen Beschallungsplatzes auf, und/oder die Frequenz oder ein Frequenzband oder eine Frequenzgruppe, was wenigstens eine wesentliche Frequenz oder ein wesentliches Frequenzband des Störsignals umfasst oder dazu bezüglich des Spektrums benachbart ist.A masking signal is preferably understood to mean noise or an additional sound signal, which is superimposed on the useful signal by means of the compensation signal and reduces the perception or perceptibility of an interference signal Frequency band or group of frequencies comprising at least one significant frequency or frequency band of the interfering signal or adjacent thereto in terms of spectrum.
Es ist bevorzugt, dass wenigstens einer der Beschallungsplätze ein Bedienelement aufweist, mit welchem die Lautstärke der Wiedergabe durch die Schallerzeugungseinrichtung des Beschallungsplatzes einstellbar ist, insbesondere in definierten Grenzen, einer Minimallautstärke und/oder Maximallautstärke.It is preferred that at least one of the sound reinforcement stations has an operating element with which the volume of the playback can be adjusted by the sound generating device of the sound reinforcement station, in particular within defined limits, a minimum volume and/or maximum volume.
Es ist zweckmäßig, dass das Geräuschunterdrückungssignal für einen Beschallungsplatz in Abhängigkeit der Nutzsignale und der Mikrophonausgangssignale der anderen Beschallungsplätze und insbesondere einer akustischen Übertragungsfunktion zwischen zwei oder mehreren oder jeweils zwei Beschallungsplätzen, erzeugt/ berechnet wird.It is expedient for the noise suppression signal for a sound reinforcement station to be generated/calculated as a function of the useful signals and the microphone output signals of the other sound reinforcement stations and in particular an acoustic transfer function between two or more or two sound reinforcement stations each.
Bevorzugt wird das Geräuschunterdrückungssignal in der Audiosignalverarbeitungseinrichtung für wenigstens einen Beschallungsplatz berechnet und mittels des Kompensationssignals bereitgestellt.The noise suppression signal is preferably calculated in the audio signal processing device for at least one sound reinforcement station and made available by means of the compensation signal.
Es ist bevorzugt, dass der für den jeweiligen Beschallungsplatz erforderliche, nutzbare Teil der Audiosignalverarbeitungseinrichtung jeweils oder in mindestens einem Fall in oder an dem Beschallungsplatz baulich getrennt von dem Rest der Audiosignalverarbeitungseinrichtung angeordnet ist.It is preferred that the usable part of the audio signal processing device required for the respective sound reinforcement station is in each case or at least a case is arranged in or at the sound reinforcement station structurally separate from the rest of the audio signal processing device.
Es ist zweckmäßig, dass die Parameter zur Berechnung des Nutzsignals und/oder des Kompensationssignals eines oder mehrerer Beschallungsplätze hinsichtlich einer oder mehrerer der folgenden Zielkriterien/Parameter erzeugt wird,
- Sprachverständlichkeit und/oder
- optimierter Klang und/oder
- Privatheit, geringe Verständlichkeit oder Nichtverständlichkeit der Beschallung an einem anderen Beschallungsplatz, insbesondere mittels eines Maskierungssignals und/oder eines Geräuschunterdrückungssignals, in Abhängigkeit des Nutzsignals eines anderen Beschallungsplatzes, dessen Privatheit gewährleistet werden soll und/oder
- Unterdrückung und/oder Maskierung von Störgeräuschen,
- Speech intelligibility and/or
- optimized sound and/or
- Privacy, low intelligibility or non-intelligibility of the sound reinforcement at another sound reinforcement station, in particular by means of a masking signal and/or a noise suppression signal, depending on the useful signal of another sound reinforcement location whose privacy is to be guaranteed and/or
- suppression and/or masking of background noise,
Unter einem Zielkriterium wird vorzugsweise ein Wert einer direkten oder indirekten Messgröße, wie beispielsweise ein aus einem gemessenen Signal extrahierter Kennwert verstanden. Das Zielkriterium basiert insbesondere auf den Kennwerten des Sprachverständlichkeitsindex oder der Mithörschwelle. Für einen Beschallungsplatz kann ein Zielkriterium Sprachverständlichkeitsindex beispielsweise dahingehend genutzt werden, die Sprachverständlichkeit eines an diesem Beschallungsplatz geführten Telefonates sicherzustellen. Alternativ kann ein Zielkriterium Sprachverständlichkeitsindex beispielsweise dazu genutzt werden, um die Sprachverständlichkeit eines Telefonates an einem anderen Beschallungsplatz für den eigenen Beschallungsplatz zu unterbinden, um so die Privatsphäre sicherzustellen. Mithilfe eines beispielsweise mittels Mithörschwelle ausgeführten Zielkriteriums kann sichergestellt werden, dass ein an einem Beschallungsplatz dargebotenes Musiksignal zu jeder Zeit, die aus vorhandenen Störsignalen bestimmte Mithörschwelle übersteigt, um so sicherzustellen, dass kein Informationsverlust bei der Musikdarbietung entsteht. Zur Erreichung eines Zielkriteriums können zweckmäßigerweise Anpassungen der Amplituden der dargebotenen Signale an den Beschallungsplätzen, Verwendung von Maskierungssignalen oder die Nutzung von Geräuschunterdrückungssignalen eingesetzt werden.A target criterion is preferably understood to be a value of a direct or indirect measured variable, such as a characteristic value extracted from a measured signal. The target criterion is based in particular on the characteristic values of the speech intelligibility index or the listening threshold. For example, a target criterion speech intelligibility index can be used for a public address station to ensure the speech intelligibility of a telephone call made at this public address station. Alternatively, a target criterion speech intelligibility index can be used, for example, to prevent the speech intelligibility of a telephone call at another PA station for one's own PA station, in order to ensure privacy. With the help of a target criterion implemented, for example, by means of a listening threshold, it can be ensured that a music signal presented at a PA station always exceeds the listening threshold determined from existing interference signals, in order to ensure that no information loss occurs during the music performance. To achieve a target criterion, adjustments to the amplitudes of the can expediently presented signals at the PA stations, the use of masking signals or the use of noise suppression signals.
Es ist bevorzugt, dass wenigstens einer oder beide oder sämtliche der Beschallungsplätze ein Gestühl, insbesondere zur Klangwiedergabe, aufweist, das eine Lehnenfläche bzw. Lehnfläche und eine Kopfstützfläche aufweist und wenigstens einen ersten und einen zweiten Aktuator zur Schwingungsanregung aufweist, wobei jeder dieser beiden Aktuatoren in dem Gestühl angeordnet ist, so dass der erste und der zweite Aktuator jeweils mit seiner Anregefläche an der Innenseite einer Bespannung der Kopfstützfläche oder der Innenseite einer Bespannung der Lehnfläche auf im Wesentlichen gleicher Höhe angeordnet ist.It is preferred that at least one or both or all of the sound reinforcement positions have a chair, in particular for sound reproduction, which has a backrest surface or backrest surface and a headrest surface and has at least a first and a second actuator for exciting vibrations, with each of these two actuators in is arranged in the stalls, so that the first and second actuators are each arranged with their excitation surface on the inside of a covering of the headrest surface or the inside of a covering of the backrest surface at essentially the same height.
Der Beschallungsplatz umfasst vorzugsweise das Gestühl einer Beschallungsanordnung insbesondere inklusive deren das Gestühl benutzenden Person akustisch direkt umgebenden bzw. einhüllenden Umfeldes.The sound reinforcement station preferably comprises the seating of a sound reinforcement arrangement, in particular including the environment acoustically directly surrounding or enveloping the person using the seating.
Das Verfahren bzw. die Beschallungsanordnung sind bevorzugt so ausgebildet, dass Notsignale bzw. Warnsignale, insbesondere von Behörden nicht ausgelöscht oder maskiert werden, wenn diese in der Audiosignalverarbeitungseinrichtung als Störgeräusch mittels eines Mikrophonausgangssignals indentifiziert werden.The method and the public address system are preferably designed in such a way that emergency signals or warning signals, in particular from authorities, are not extinguished or masked if they are identified in the audio signal processing device as background noise by means of a microphone output signal.
Die Audiosignalverarbeitungseinrichtung ist vorzugsweise als Zentraleinheit für sämtliche Beschallungsplätze ausgebildet.The audio signal processing device is preferably designed as a central unit for all sound reinforcement stations.
Es ist bevorzugt, dass die Audiosignalverarbeitungseinrichtung in einem einzigen oder mehreren Steuergeräten integriert ist und/oder durch Software verwirklich ist. Diese/s Steuergerät/e kann bzw. können ansonsten anderen Funktionen oder vornehmlich andere Funktionen haben, insbesondere kann dies ein einziges zentrales Steuergerät eines Kraftfahrzeugs sein.It is preferred that the audio signal processing device is integrated in a single or multiple control devices and/or is implemented by software. This/s control unit(s) can otherwise have other functions or primarily other functions; in particular, this can be a single central control unit of a motor vehicle.
Bevorzugt weist der Aktuator einen elektrischen Antrieb zur Wandlung elektrischer Signale in mechanische Auslenkungen bzw. mechanische Schwingungen auf, wobei der Antrieb eine Spule aufweist, durch welche der Strom des elektrischen Signals fließen kann bzw. fließt und einen Permanentmagneten aufweist, welcher mit der Spule in elektromagnetischer Wechselwirkung stehen kann bzw. steht, des Weiteren weist der Aktuator ein Gehäuse mit einer Anregefläche auf, wobei das Gehäuse und/oder die Anregefläche durch den elektrischen Antrieb mechanisch ausgelenkt und/oder mechanisch zu Schwingungen angeregt werden kann bzw. wird und dabei akustische Schallsignale abstrahlen kann.The actuator preferably has an electrical drive for converting electrical signals into mechanical deflections or mechanical vibrations. wherein the drive has a coil through which the current of the electrical signal can or does flow and has a permanent magnet which can or does interact electromagnetically with the coil, the actuator also has a housing with an excitation surface, wherein the housing and/or the excitation surface can be mechanically deflected by the electric drive and/or can be or is mechanically excited to vibrate and can emit acoustic sound signals in the process.
Die elektrischen Signale durch die Spule weisen zweckmäßigerweise die Informationen des abzustrahlenden Schallsignals bzw. des Nutzsignals und/oder des Kompensationssignals auf, insbesondere eines Musiksignals und/oder Sprachsignals.The electrical signals through the coil expediently have the information of the sound signal to be radiated or the useful signal and/or the compensation signal, in particular a music signal and/or speech signal.
Es ist bevorzugt, dass der Aktuator ausgelegt ist, akustischen Schall abzustrahlen, und/oder so ausgebildet ist, dass der Aktuator seine Anregefläche und damit ein verbundenen Körper zu Schwingungen seiner Körperstruktur anregt bzw. anregen kann, wodurch der von Luft umgebene flächige Körper Schallwellen emittiert.It is preferred that the actuator is designed to emit acoustic sound and/or is designed in such a way that the actuator excites or can excite its excitation surface and thus a connected body to vibrate its body structure, as a result of which the flat body surrounded by air emits sound waves .
Das Verfahren und die Beschallungsanordnung sind bevorzugt zur Nutzung in Kraftfahrzeugen, insbesondere Automobilen oder Bussen, ausgebildet, alternativ vorzugsweise zur Nutzung in Flugzeugen oder Schiffen/Booten.The method and the public address arrangement are preferably designed for use in motor vehicles, in particular automobiles or buses, alternatively preferably for use in airplanes or ships/boats.
Anhand der
Anhand der
- eine durch die
Audiosignalverarbeitungseinrichtung 1 berechnete Mithörschwelle M, zur Verringerung des Mithörens zwischen verschiedenen Beschallungsplätzen, wobei das Nutzsignal und das Kompensationssignal für die aktiven Beschallungsplätze in Abhängigkeit der Mithörschwelle M und beispielgemäß einer Übertragungs- und/oder Übersprechfunktion G zwischen definierten Beschallungsplätzen durch dieAudiosignalverarbeitungseinrichtung 1 berechnet und bereitgestellt wird, - einen Sprachverständlichkeitsindex STI, welcher für jeden Beschallungsplatz durch die
Audiosignalverarbeitungseinrichtung 1 berechnet wird und das Nutzsignal S in Abhängigkeit des Sprachverständlichkeitsindex STI berechnet wird, damit Sprachsignale an dem Beschallungsplatz eine Mindestsprachverständlichkeit aufweisen, - ein Geräuschunterdrückungssignal ANC in der
Audiosignalverarbeitungseinrichtung 1 für wenigstens einen Beschallungsplatz berechnet wird und mittels des Kompensationssignals K bereitgestellt wird, und/oder - ein Maskierungssignal Msk durch die
Audiosignalverarbeitungseinrichtung 1 berechnet wird zur Maskierung definierter Geräuschanteile in bzw. an einem Beschallungsplatz.
- a listening threshold M calculated by the audio
signal processing device 1 to reduce listening between different sound reinforcement positions, the useful signal and the compensation signal for the active sound reinforcement positions being calculated by the audiosignal processing device 1 as a function of the listening threshold M and, for example, a transmission and/or crosstalk function G between defined sound reinforcement positions and is provided - a speech intelligibility index STI, which is calculated for each public address station by the audio
signal processing device 1 and the useful signal S is calculated as a function of the speech intelligibility index STI, so that speech signals at the public address station have a minimum speech intelligibility, - a noise reduction signal ANC is calculated in the audio
signal processing device 1 for at least one sound reinforcement station and is provided by means of the compensation signal K, and/or - a masking signal Msk is calculated by the audio
signal processing device 1 for masking defined noise components in or at a sound reinforcement station.
Beschallungsplatz A weist beispielhaft, wie jeder der Beschallungsplätze eine Audioausgabeeinheit 3 auf, welche beispielhaft eine Lautsprechereinheit umfasst, allerdings auch einen Anschluss für Kopfhörer oder für sonstige audioausgabefähige Geräte aufweisen kann.Public address station A has, for example, like each of the public address stations, an audio output unit 3 which, for example, includes a loudspeaker unit, but can also have a connection for headphones or for other devices capable of audio output.
Für die Sprachverständlichkeit an Passagierposition bzw. Beschallungsplatz A muss dementsprechend ein ausreichender Abstand zur Mithörschwelle M gegeben sein. Gleichzeitig lässt sich durch die Kenntnis der Übertragungsfunktion G zwischen den einzelnen Beschallungsplätzen abschätzen, wie verständlich das Nutzsignal S, A von Beschallungsplatz A an einem anderen Beschallungsplatz beispielsweise B ist. So könnte durch eine geringfügige Herabsetzung des Sprachverständlichkeitsindex STI des Nutzsignals S, A an Position A bereits ein ausreichend geringer Sprachverständlichkeitsindex STI an Position B erreicht werden.Accordingly, for speech intelligibility at passenger position or PA position A, there must be a sufficient distance to the listening threshold M. At the same time, by knowing the transfer function G between the individual sound reinforcement positions, it is possible to estimate how understandable the useful signal S, A from sound reinforcement position A is at another sound reinforcement position, for example B. A sufficiently low speech intelligibility index STI at position B could thus be achieved by a slight reduction in the speech intelligibility index STI of the useful signal S, A at position A.
Im Fall der Steuerung, Option A wird nach dem Soll/Ist-Abgleich 9 für die eingestellten Zielgrößen bzw. Zielkriterium 8 entschieden, ob das Nutzsignal S im Sinne der Sprachverständlichkeit / Mithörerbeeinflussung u.a. angepasst werden muss oder nicht 10. Das Nutzsignal 10 wird dementsprechend direkt ausgegeben oder optimiert, nach einer Berechnung eines angepassten Nutzsignals 11, ausgegeben.In the case of control, option A, after the target/
Im Fall der Regelung, Option B wird zunächst ein Nutzsignal geschätzt 12, dass dem Soll/Ist-Abgleich standhält, und die Ausgabe des Signals wird anschließend im Regelkreis kontinuierlich neu bewertet und gegebenenfalls angepasst.In the case of control, option B, a useful signal is first estimated 12 that withstands the target/actual comparison, and the output of the signal is then continuously re-evaluated in the control loop and adjusted if necessary.
Dabei wir nach der Schätzung 12 des angepassten Nutzsignals S dieses angepasste Nutzsignal S ausgegeben, wonach eine Sensierung mittels Mikrofon 3 erfolgt. In Abhängigkeit der durch das Mikrofon erfassten Signals wird ein Vergleich 9 des Zielkriteriums 8, wie beispielsweise eines minimalen Sprachverständlichkeitsindex STI durchgeführt. Es wird geprüft, ob das Zielkriterium erreicht ist 10. Im Fall, der Erreichung wir das Nutzsignal weiter ausgegeben. Im Fall, dass das Zielkriterium nicht erreicht wurde, wird eine Berechnung 11 des neu angepassten Nutzsignals durchgeführt und dieses anschließend ausgegeben.In this case, after the estimate 12 of the adjusted useful signal S, this adjusted useful signal S is output, after which sensing is carried out using a microphone 3 . Depending on the signal detected by the microphone, a
Auch hier wird aus den unbekannten Nuk und bekannten N Störsignalen eine Mithörschwelle M berechnet 7, bei vorheriger Analyse 5 der unbekannten Störgeräusche Nuk sowie bei vorheriger Analyse 6 der anderen, bekannten Störsignale N. Die Mithörschwellle M dient als Basis für einen Soll/Ist-Abgleich 9 mit dem wenigstens einen Zielkriterium 8.Here, too, a listening threshold M is calculated from the unknown Nuk and known N interference signals 7, with
Da aber auch der Fall eintreten kann, dass der Passagier kein eigenes Nutzsignal S anfordert, also beispielsweise kein Radio hört oder telefoniert, bewertet der Algorithmus zunächst, ob ein Nutzsignal gefordert ist, und wenn ja, ob dieses als Maskierung der Fremdsignale ausreicht 13. Falls ein Nutzsignal an Position B gefordert ist und dieses das Zielkriterium erfüllt 10 z.B. Telefonat von Passagier A ist nicht verständlich, wird das Signal S ausgegeben und weiterhin im Regelkreis mittels Mikrofon 3 kontrolliert und ggfs. nachgeregelt, mittels zusätzlichem Vergleich Ist/Soll 9 des Zielkriterium, wonach wieder die Bewertung erfolgt, ob das Zielkriterium erfüllt ist 10. Sollte das Nutzsignal als Maskierer nicht ausreichen oder gar kein Nutzsignal vorliegen, wird der Noisecancellingalgorithmus, auch ANC-Algorithmus (Active-Noise-Cancelling) genannt, zur Geräuschunterdrückung und Erzeugung eines Geräuschunterdrückungssignals ANC für die Einhaltung der Zielwerte verwendet 14. Anschließend findet ein weiterer Ist/ Soll Vergleich 9 hinsichtlich des Zielkriteriums 8 mittels des durch das Mikrofon 3 sensierte Signal statt. Für den Fall, dass auch unter Nutzung des Geräuschunterdrückungssignals ANC noch immer nicht der Soll-Zielwert bzw. das Zielkriterium 8 (z.B. des minimalen Sprachverständlichkeitsindex) erreicht ist 10, wird ein Maskierungssignal M erzeugt 15 und in diesem Fall die Sprachverständlichkeit auf den Zielwert herabsetzt. In Abhängigkeit des erzeugten Maskierungssignals M wird das angepasste Nutzsignal berechnet 11 und anschließend wird das angepasste Nutzsignal S' ausgegeben.However, since the case can also arise that the passenger does not request his own useful signal S, for example not listening to the radio or making a phone call, the algorithm first evaluates whether a useful signal is required and, if so, whether this is sufficient to mask the external signals 13. If a useful signal is required at position B and this satisfies the
Die Klangregelung des Verfahrens nach
- 11
- Audiosignalverarbeitungseinrichtungaudio signal processing device
- 22
- Mikrophonmicrophone
- 33
- Audioausgabeeinheitaudio output unit
- 44
- Klassifizierung des eigenen NutzsignalsClassification of your own useful signal
- 55
- Analyse der unbekannten StörgeräuscheAnalysis of the unknown noise
- 66
- Analyse der anderen NutzsignaleAnalysis of the other useful signals
- 77
- Berechnung der MithörschwelleCalculation of the listening threshold
- 88th
- Zielkriteriumtarget criterion
- 99
- Vergleich Ist/SollComparison actual/target
- 1010
- Prüfung ZielkriteriumExamination target criterion
- 1111
- Berechnung des angepassten NutzsignalsCalculation of the adjusted useful signal
- 1212
- Schätzung angepasstes NutzsignalEstimate adjusted useful signal
- 1313
- Nutzsignal zur Maskierung ausreichendUseful signal sufficient for masking
- 1414
- Erzeugung GeräuschunterdrückungssignalGeneration of noise canceling signal
- 1515
- Erzeugung eines MaskierungssignalsGeneration of a masking signal
- A, B, C, DA,B,C,D
- BeschallungsplätzePA places
- SS
- Nutzsignaluseful signal
- S'S'
- angepasstes Nutzsignaladapted useful signal
- NN
- Störsignal bekannt, eines benachbarten BeschalltungsplatzesInterference signal known from a neighboring PA station
- Nuknuc
- Störsignal unbekanntInterfering signal unknown
- ΣNΣN
- Summenstörsignalcumulative interference signal
- GG
- Übertragungsfunktiontransfer function
- KK
- Kompensationssignalcompensation signal
- MM
- Mithörschwellelistening threshold
- STISTI
- Sprachverständlichkeitsindexspeech intelligibility index
- ANCANC
- Geräuschunterdrückungssignalnoise canceling signal
- MskMsk
- Maskierungssignalmasking signal
Claims (9)
wenigstens einer der Beschallungsplätze (A, B, C, D) ein Bedienelement aufweist, mit welchem die Lautstärke der Wiedergabe durch die Schallerzeugungseinrichtung (3) des Beschallungsplatzes einstellbar ist, insbesondere in definierten Grenzen, einer Minimallautstärke und/oder Maximallautstärke.Method according to one of the preceding claims, characterized in that
at least one of the sound reinforcement stations (A, B, C, D) has an operating element with which the volume of the playback by the sound generating device (3) of the sound reinforcement station can be adjusted, in particular within defined limits, a minimum volume and/or maximum volume.
der für den jeweiligen Beschallungsplatz (A, B, C, D) erforderliche, nutzbare Teil der Audiosignalverarbeitungseinrichtung (1) jeweils oder in mindestens einem Fall in oder an dem Beschallungsplatz baulich getrennt von dem Rest der Audiosignalverarbeitungseinrichtung (1) angeordnet ist.Method according to one of the preceding claims, characterized in that
the usable part of the audio signal processing device (1) required for the respective sound reinforcement station (A, B, C, D) is in each case or in at least one case in or on the sound reinforcement station structurally separate from the rest of the audio signal processing device (1).
das eine Lehnfläche und eine Kopfstützfläche aufweist und wenigstens einen ersten und einen zweiten Aktuator zur Schwingungsanregung aufweist, wobei jeder dieser beiden Aktuatoren in dem Gestühl angeordnet sind, so dass der erste und der zweite Aktuator jeweils mit seiner Anregefläche an der Innenseite einer Bespannung der Kopfstützfläche oder der Innenseite einer Bespannung der Lehnfläche auf im Wesentlichen gleicher Höhe angeordnet ist.Method according to one of the preceding claims, characterized in that at least one or both or all of the sound reinforcement positions (A, B, C, D) have a chair, in particular for sound reproduction,
which has a backrest surface and a headrest surface and has at least a first and a second actuator for exciting vibrations, each of these two actuators being arranged in the chair, so that the first and the second actuator can each have its excitation surface on the inside of a covering of the headrest surface or the inside of a covering of the backrest is arranged at essentially the same height.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020211090 | 2020-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3965434A1 true EP3965434A1 (en) | 2022-03-09 |
Family
ID=77595454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21194383.2A Withdrawn EP3965434A1 (en) | 2020-09-02 | 2021-09-01 | Method for improved sonication of a plurality of sonication areas |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3965434A1 (en) |
CN (1) | CN114203142B (en) |
DE (1) | DE102021209638A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110235813A1 (en) * | 2005-05-18 | 2011-09-29 | Gauger Jr Daniel M | Adapted Audio Masking |
EP3040984A1 (en) * | 2015-01-02 | 2016-07-06 | Harman Becker Automotive Systems GmbH | Sound zone arrangement with zonewise speech suppression |
EP3048608A1 (en) * | 2015-01-20 | 2016-07-27 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. | Speech reproduction device configured for masking reproduced speech in a masked speech zone |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2570359C2 (en) * | 2010-12-03 | 2015-12-10 | Фраунхофер-Гезелльшафт Цур Фердерунг Дер Ангевандтен Форшунг Е.Ф. | Sound acquisition via extraction of geometrical information from direction of arrival estimates |
CN103546849B (en) * | 2011-12-30 | 2017-04-26 | Gn瑞声达A/S | Binaural hearing aids with frequency unmasking |
DE102013105375A1 (en) * | 2013-05-24 | 2014-11-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | A sound signal generator, method and computer program for providing a sound signal |
CN110544486B (en) * | 2019-09-02 | 2021-11-02 | 上海其高电子科技有限公司 | Speech enhancement method and system based on microphone array |
-
2021
- 2021-09-01 DE DE102021209638.7A patent/DE102021209638A1/en active Pending
- 2021-09-01 CN CN202111019649.4A patent/CN114203142B/en active Active
- 2021-09-01 EP EP21194383.2A patent/EP3965434A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110235813A1 (en) * | 2005-05-18 | 2011-09-29 | Gauger Jr Daniel M | Adapted Audio Masking |
EP3040984A1 (en) * | 2015-01-02 | 2016-07-06 | Harman Becker Automotive Systems GmbH | Sound zone arrangement with zonewise speech suppression |
EP3048608A1 (en) * | 2015-01-20 | 2016-07-27 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. | Speech reproduction device configured for masking reproduced speech in a masked speech zone |
Non-Patent Citations (1)
Title |
---|
ROCHA RYAN D: "A FREQUENCY-DOMAIN METHOD FOR ACTIVE ACOUSTIC CANCELLATION OF KNOWN AUDIO SOURCES", CALIFORNIA POLYTECHNIC STATE UNIVERSITY, 30 June 2014 (2014-06-30), pages 1 - 120, XP055880504, Retrieved from the Internet <URL:https://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=2331&context=theses> [retrieved on 20220117] * |
Also Published As
Publication number | Publication date |
---|---|
DE102021209638A1 (en) | 2022-03-03 |
CN114203142B (en) | 2025-03-07 |
CN114203142A (en) | 2022-03-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3451705B1 (en) | Method and apparatus for the rapid detection of own voice | |
EP1912473A1 (en) | Processing an input signal in a hearing aid | |
DE102014214052A1 (en) | Virtual masking methods | |
EP2229010A2 (en) | Method for compensating for interference in a hearing aid, hearing aid and method for adjusting same | |
EP2226795A1 (en) | Hearing aid and method for reducing interference in a hearing aid | |
DE102017222750A1 (en) | Control device and method for improving a noise quality of an air conditioning system | |
EP3793209B1 (en) | Hearing device with active noise cancellation and method for operating it | |
EP1808853B1 (en) | Public address system, method and computer program to enhance the speech intelligibility of spoken messages | |
WO2021204754A1 (en) | Method, device, headphones and computer program for actively suppressing interfering noise | |
EP1800291B1 (en) | Device for the acoustic communication and/or perception in a motor vehicle | |
DE102008046040A1 (en) | Method for operating a hearing device with directivity and associated hearing device | |
EP3965434A1 (en) | Method for improved sonication of a plurality of sonication areas | |
DE102020207482B4 (en) | Method for outputting user-specific acoustic signals with an output unit, computer program product and electronic signal processing system | |
DE102019203786A1 (en) | Hearing aid system | |
DE102017210688B4 (en) | Sound generating device for a motor vehicle | |
DE102005037895B3 (en) | Hearing apparatus and method for determining information about room acoustics | |
EP3403260B1 (en) | Method and apparatus for conditioning an audio signal subjected to lossy compression | |
EP1351550B1 (en) | Method for adapting a signal amplification in a hearing aid and a hearing aid | |
EP2584795A2 (en) | Method for determining a compression characteristic curve | |
WO2023066908A1 (en) | Audio masking of language | |
EP2373063A1 (en) | Hearing device and method for setting the same for acoustic feedback-free operation | |
DE102013221127A1 (en) | Operation of a communication system in a motor vehicle | |
EP2262282A2 (en) | Method for determining a frequency response and corresponding hearing aid | |
DE102016005904A1 (en) | Instantaneous noise suppression in a motor vehicle | |
EP4167229B1 (en) | Audio masking of speakers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20220909 |