EP0737022B1 - Einrichtung zur Verminderung von Störschall - Google Patents
Einrichtung zur Verminderung von Störschall Download PDFInfo
- Publication number
- EP0737022B1 EP0737022B1 EP96104496A EP96104496A EP0737022B1 EP 0737022 B1 EP0737022 B1 EP 0737022B1 EP 96104496 A EP96104496 A EP 96104496A EP 96104496 A EP96104496 A EP 96104496A EP 0737022 B1 EP0737022 B1 EP 0737022B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microphone
- ear
- headphone
- noise
- compensating element
- 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.)
- Expired - Lifetime
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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
Definitions
- the invention relates to a device for reducing noise at human Ear, with a noise-picking microphone and a playback transducer, via a compensation circuit connected to the microphone a signal for noise compensation is supplied.
- the Facility includes a telephone handset, the earpiece of which is centrally located in front of the Loudspeaker housing has.
- the microphone is in the housing Recording the noise.
- a portion of the housing extends towards the outside, so that when using the telephone handset it is in the outside Extends the area of a user's ear canal. In this position it takes Microphone detects the sound at the entrance to the ear canal and detects the exact one Sound field that hits the user's ear.
- the case comes with numerous side openings provide a short path from the microphone to Realize speakers. This creates a small acoustic resistance and a low phase delay between speaker and microphone.
- Openings in connection with the housing represent a resonator, these are matched to each other in such a way that no resonances are in the audible range lying frequency values occur. While the microphone through the openings record the sound field emanating from a user's ear as freely as possible is a piece between the speaker and a grille Foam arranged to reflect from a user's ear canal to dampen.
- the two independent, acoustically separated sound transducers contains, the membrane of which is arranged in one plane, the as a loudspeaker working first sound transducer a ring-shaped, the ear of a user has facing membrane, and the second sound transducer working as a microphone absorbs the sound coming from outside.
- the microphone only interferes with the external noise that comes from outside, which converted into an electrical signal, amplified and with a phase shift of 180 ° to the useful signal is added to the in the ear canal to compensate for disturbing noise.
- the U.S. Patent US-A-4 494 074 describes a control device to Reduce noise in the reproduction of music or voices.
- the Control device is intended for use in a headphone just a small cavity between a speaker diaphragm and the Has a user's ear.
- a microphone for recording a feedback signal is placed close to the user's ear canal to essentially the Record pressure conditions at the outer mouth of the ear canal to rule.
- a device known from DE-C-4 200 811 has headphones acoustically closed ear-enclosing shells.
- the microphone for Recording of the noise is offset in front of the playback transducer to the main center axis arranged of the playback converter.
- the one picked up by the microphone Noise is first fed to an amplifier, then filtered and then in turn increasingly fed to the playback transducer, the one to the noise anti-phase noise signal excited.
- the known devices do not work under certain conditions always satisfactory. This is how the headphones shape around the ear poor ventilation of the ear, causing sweating of the headphones covered area is supported, especially since the headphones with a relatively high Pressure is on. This leads to the fact that the known device for comfort reasons reluctant to wear and uncomfortable to use.
- the object is achieved with a device of the type mentioned Art solved in that the microphone is arranged so that it with the microphone sound inlet when using the device spaced from the ear and on the ear is aligned that the microphone is a compensating element to reduce the Effect of reflections on the ear has that the compensating element, the sound entry opening covered the microphone and that the device is a closed Shell which has the outer opening of the ear canal in the essentially tightly encloses.
- Such a closed shell is worn lying on the ear to the to enclose the outer opening of the auditory canal essentially tightly. This ensures at the same time that the microphone picking up the noise is in a substantially constant predetermined position relative to the ear canal a user's ear. To those who rule in this position The compensation circuit can be matched to acoustic conditions. Of further advantageously the area near the outer Opening of the ear canal is essentially acoustic by the user surrounding space separated. This ensures essentially the same acoustic conditions between the ear and the conch, even if external changes occur Circumstances.
- the pressure according to the invention also increases with increased pressure Set up the loop gain of the compensation circuit less than at a device without reflector and The stability of the control loop is also with increased pressure on the headphones ensured.
- the microphone and the compensation converter are also aligned with the ear and preferably centered on one Axis of symmetry, e.g. the axis of rotational symmetry, as shown in FIG. 1 is shown.
- the compensation element by a circular plate is formed, which is directed towards the transducer for receiving the Microphones. This fixes the microphone in relation to the Compensation elements possible.
- headphones / hearing protection with a device it is furthermore advantageous if the headphones are not around the ear, but is designed on-the-ear, so that there is a smaller size and a significantly less weight of the headphones and despite less pressure of the headphones than in the known device, the noise reduction compared the known device is sufficiently good and is even improved.
- the comfort of headphones / hearing protection designed in this way is opposite the known device greatly improved, especially since the weight of the headphones the known headphones can be reduced by about 50%.
- Fig. 1 shows part of an on-ear headphone 1 with an acoustically closed Ear pads 2 and shell 3.
- the noise coming to the ear 4 is picked up by a microphone 5, which sends the recording signal to a Compensation circuit 6 transmits, which in turn for noise compensation outputs a signal to a playback transducer 7, which compensates for the noise Signal excited.
- the microphone 5 has a sound inlet opening 8, which is provided by a compensating element 9 is covered. Both the playback converter 7, and that Microphone 5 are aligned in the direction of the human ear 12, so that Compensation element 9, the microphone 5 and the playback transducer 7 a common Axis of symmetry, which is preferably the axis of rotation.
- the compensating element 9, as shown in Fig. 1b and 1c, consists of a plate 10, which has projections 11 directed towards the playback transducer.
- the Distance between the plate 10 of the compensating element and the sound inlet opening of the microphone is about 1 to 3 mm.
- the plate 10 is circular formed and has a diameter of about 0.5 to 3 cm, preferably about 1.5 cm and is made of plastic.
- the microphone is picked up by a sleeve with a circumferential bead the front part of the sleeve fits into the area between the projections 11 of the compensating element 9 until the circumferential bead rests on the projections.
- the position of the microphone with respect to the compensation element 9 is thus fully defined.
- the compensating element causes reflections from the human ear, which due to the individually designed human ear cup shape are different for every person, in a defined size for Microphone in which it is converted to a corresponding electrical signal become.
- the sound reflection defined by means of the compensating element increases the loop gain of the compensation circuit shown in Fig. 3 less on than without the reflector when the pressure is increased.
- So is the stability of the control loop of the compensation circuit too ensured with increased pressure on the headphones.
- the on-ear shape of the headphones / hearing protection according to the invention covers a significantly smaller area of the human ear than one circumaural shape, as shown in Fig. 2. This will make the Sweating considerably compared to the headphone shape shown in FIG. 2 reduced and the smaller size with the on-ear form reduced overall, the weight of the headphones / hearing protection drastically and carries thus overall for increased comfort. Beyond that you come across the on-ear form shown in Fig. 1 with a relatively small Pressing force of about 3.5 Newtons, which further compared to the wearing comfort the known device shown in Fig. 2, in which the contact pressure is about 10 Newton is increased.
- Fig. 2 the same components as in Fig. 1 are designated by the same reference number.
- the microphone 5 is offset by 90 ° to the main axis in the known device of the playback converter arranged in front of the playback converter.
- the sound entry opening is not covered in the microphone shown in FIG. 2.
- the headphones shown in FIG. 2 are circumaural headphones, whose contact pressure is about 10 Newtons and thus about 3 times that 1 according to the invention must be headphones.
- the headphones shown in FIG. 2 are about twice as heavy as those in FIG. 1 shown headphones, which weighs about 180 g.
- the compensation circuit for the device according to the invention has in principle the structure shown in Fig. 3, which is known from DE-4200811 essentially is.
- the output signal 17 generated by the microphone 5 is from a first Amplifier 14 pre-amplified, evaluated in a filter 16 and in another Amplifier 18 amplified such that there is an antiphase excitation of the playback transducer 7 results.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
- Fig. 1
- zeigt einen Querschnitt eines ohraufliegenden Kopfhörers mit einer erfindungsgemäßen Einrichtung zur Verminderung von Störschall am menschlichen Ohr.
- Fig. 2
- zeigt einen Querschitt eines Kopfhörers mit einer bekannten Einrichtung zur Verminderung von Störschall.
- Fig. 3
- zeigen Blockschaltdiagramme der elektrischen Teile der Einrichtung zur Verminderung von Störschall am menschlichen Ohr.
Claims (8)
- Einrichtung zur Verminderung von Störschall am menschlichen Ohr, mit einem den Störschall aufnehmendem Mikrofon (5) und einem Wiedergabewandler (7), dem von einer mit dem Mikrofon (5) verbundenen Kompensationsschaltung (6) ein Signal zur Störschallkompensation zugeführt wird,
dadurch gekennzeichnet, daß das Mikrofon (5) so angeordnet ist, daß es mit dem Mikrofon-Schalleinlaß im Einsatz der Einrichtung zum Ohr beabstandet und auf das Ohr ausgerichtet ist, daß das Mikrofon ein Ausgleichselement (9) zur Verminderung der Wirkung von Reflexionen am Ohr aufweist, daß das Ausgleichselement (9) die Schalleintrittsöffnung (8) des Mikrofons (5) überdeckt und daß die Einrichtung eine akustisch geschlossene Muschel aufweist, welche die äußere Öffnung des Gehörganges des Ohres im wesentlichen dicht umschließt. - Einrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß das Mikrofon (5) und der Wiedergabewandler (7) in der gleichen Richtung ausgerichtet sind und vorzugsweise auf einer Rotationsachse (HA) liegen, welche die Mittelachse des Wandlers (7), des Mikrofons (5) als auch des Ausgleichselements (9) bildet. - Einrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Ausgleichselement (9) eine Platte (10) ist, die auf das Mikrofon (5) gerichtete Vorsprünge (11) zur Aufnahme des Mikrofons (5) aufweist. - Einrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß die Platte (10) kreisförmig ausgebildet ist und einen Durchmesser von etwa 0,5 cm bis 3 cm, vorzugsweise etwa 1,5 cm aufweist. - Einrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Ausgleichselement (9) bzw. die Platte (10) aus Kunststoff besteht. - Kopfhörer/Gehörschutz mit einer Einrichtung zur Verminderung von Störschall nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der oder Kopfhörer/Gehörschutz ein akustisch geschlossenes System in ohraufiegender Form aufweist. - Kopfhörer/ Gehörschutz nach Anspruch 6,
dadurch gekennzeichnet, daß der Kopfhörer/ Gehörschutz eine Hör-/ Sprechgarnitur mit einem Sprechmikrofon aufweist. - Kopfhörer/ Gehörschutz nach Anspruch 6 oder 7,
dadurch gekennzeichnet, daß der Kopfhörer/ Gehörschutz Mittel zur drahtlosen Kommunikation mit einer Sende- und/oder Empfangsanlage aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19513111A DE19513111A1 (de) | 1995-04-07 | 1995-04-07 | Einrichtung zur Verminderung von Störschall |
DE19513111 | 1995-04-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0737022A2 EP0737022A2 (de) | 1996-10-09 |
EP0737022A3 EP0737022A3 (de) | 1997-07-30 |
EP0737022B1 true EP0737022B1 (de) | 2000-05-31 |
Family
ID=7759081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96104496A Expired - Lifetime EP0737022B1 (de) | 1995-04-07 | 1996-03-21 | Einrichtung zur Verminderung von Störschall |
Country Status (3)
Country | Link |
---|---|
US (1) | US6122383A (de) |
EP (1) | EP0737022B1 (de) |
DE (2) | DE19513111A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4509450B2 (ja) * | 1999-12-24 | 2010-07-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 一体化されたマイクロホンを有するヘッドホン |
US6741718B1 (en) * | 2000-08-28 | 2004-05-25 | Gn Jabra Corporation | Near-field speaker/microphone acoustic/seismic dampening communication device |
DE10112305B4 (de) * | 2001-03-14 | 2004-01-08 | Siemens Ag | Gehörschutz und Verfahren zum Betrieb einer geräuschemittierenden Einrichtung |
DE10117705C2 (de) * | 2001-04-09 | 2003-02-27 | Hoergeraete Kind Gmbh U Co Kg | Kaskadiertes Kapsel-Gehörschutzsystem |
CN1565016A (zh) * | 2001-10-03 | 2005-01-12 | 皇家飞利浦电子股份有限公司 | 再生声音信号的方法和声音再生系统 |
US6639987B2 (en) * | 2001-12-11 | 2003-10-28 | Motorola, Inc. | Communication device with active equalization and method therefor |
US20040086141A1 (en) * | 2002-08-26 | 2004-05-06 | Robinson Arthur E. | Wearable buddy audio system |
DE102005052548A1 (de) * | 2005-11-02 | 2007-05-03 | Sennheiser Electronic Gmbh & Co. Kg | Wandlersystem für eine aktive Lärmkompensationsvorrichtung |
DE202007018429U1 (de) | 2007-01-08 | 2008-06-26 | Sennheiser Electronic Gmbh & Co. Kg | Kopfhörer |
DE102007001980A1 (de) | 2007-01-08 | 2008-07-10 | Sennheiser Electronic Gmbh & Co. Kg | Kopfhörer |
US9558732B2 (en) * | 2007-08-15 | 2017-01-31 | Iowa State University Research Foundation, Inc. | Active noise control system |
DE102008030007B4 (de) * | 2008-06-24 | 2012-01-19 | Zöllner GmbH | Kopfhörer und Rottenwarngerät mit einem Kopfhörer |
EP2161717A1 (de) | 2008-09-08 | 2010-03-10 | Deutsche Thomson OHG | Verfahren zur Dämpfung oder Unterdrückung eines Rauschsignals für einen Zuhörer, der eine besondere Art von Kopfhörer oder Ohrhörer trägt, entsprechender Kopfhörer oder Ohrhörer und dazugehöriges Lautsprechersystem |
DE102009005302B4 (de) | 2009-01-16 | 2022-01-05 | Sennheiser Electronic Gmbh & Co. Kg | Schutzhelm und Vorrichtung zur aktiven Störschallunterdrückung |
SG11201407474VA (en) * | 2012-07-13 | 2014-12-30 | Razer Asia Pacific Pte Ltd | An audio signal output device and method of processing an audio signal |
US11601744B2 (en) * | 2020-06-23 | 2023-03-07 | Synaptics Incorporated | Headphone alignment systems and methods |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4494074A (en) * | 1982-04-28 | 1985-01-15 | Bose Corporation | Feedback control |
US4644581A (en) * | 1985-06-27 | 1987-02-17 | Bose Corporation | Headphone with sound pressure sensing means |
US4887693A (en) * | 1987-06-24 | 1989-12-19 | Shure Brothers, Inc. | Wind and breath noise protector for microphones |
US4922542A (en) * | 1987-12-28 | 1990-05-01 | Roman Sapiejewski | Headphone comfort |
US5138664A (en) * | 1989-03-25 | 1992-08-11 | Sony Corporation | Noise reducing device |
US5117461A (en) * | 1989-08-10 | 1992-05-26 | Mnc, Inc. | Electroacoustic device for hearing needs including noise cancellation |
US4975966A (en) * | 1989-08-24 | 1990-12-04 | Bose Corporation | Reducing microphone puff noise |
US5182774A (en) * | 1990-07-20 | 1993-01-26 | Telex Communications, Inc. | Noise cancellation headset |
US5349140A (en) * | 1992-08-07 | 1994-09-20 | Valenzin Lawrence R | Microphone windscreen |
US5381485A (en) * | 1992-08-29 | 1995-01-10 | Adaptive Control Limited | Active sound control systems and sound reproduction systems |
US5410608A (en) * | 1992-09-29 | 1995-04-25 | Unex Corporation | Microphone |
CA2101500C (en) * | 1992-09-30 | 1996-12-17 | Charles Spurgeon Bartlett | Noise-cancelling telephone handset |
US5365595A (en) * | 1993-02-19 | 1994-11-15 | Motorola, Inc. | Sealed microphone assembly |
US5329593A (en) * | 1993-05-10 | 1994-07-12 | Lazzeroni John J | Noise cancelling microphone |
US5452361A (en) * | 1993-06-22 | 1995-09-19 | Noise Cancellation Technologies, Inc. | Reduced VLF overload susceptibility active noise cancellation headset |
US5375174A (en) * | 1993-07-28 | 1994-12-20 | Noise Cancellation Technologies, Inc. | Remote siren headset |
US5673330A (en) * | 1995-11-08 | 1997-09-30 | Chang; Ching-Lu | Microphone transducer with noise reducing member |
-
1995
- 1995-04-07 DE DE19513111A patent/DE19513111A1/de not_active Withdrawn
-
1996
- 1996-03-21 EP EP96104496A patent/EP0737022B1/de not_active Expired - Lifetime
- 1996-03-21 DE DE59605337T patent/DE59605337D1/de not_active Expired - Lifetime
- 1996-04-08 US US08/630,717 patent/US6122383A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US6122383A (en) | 2000-09-19 |
DE19513111A1 (de) | 1996-10-10 |
EP0737022A2 (de) | 1996-10-09 |
EP0737022A3 (de) | 1997-07-30 |
DE59605337D1 (de) | 2000-07-06 |
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