GB2494849A - Microphone assembly - Google Patents
Microphone assembly Download PDFInfo
- Publication number
- GB2494849A GB2494849A GB1106320.3A GB201106320A GB2494849A GB 2494849 A GB2494849 A GB 2494849A GB 201106320 A GB201106320 A GB 201106320A GB 2494849 A GB2494849 A GB 2494849A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- transducers
- microphone assembly
- assembly according
- array
- 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- Withdrawn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
Classifications
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
-
- 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
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/027—Spatial or constructional arrangements of microphones, e.g. in dummy heads
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Health & Medical Sciences (AREA)
- Circuit For Audible Band Transducer (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
A microphone assembly is disclosed that has a first sound transducer array 1 arranged to detect sound in a first direction, and has a set of sound transducers including at least one second sound transducer array 2 arranged to detect sound in a second direction substantially perpendicular to the first direction. The second set may comprise a third sound transducer array 3 arranged to detect sound in a third direction substantially opposite to the second direction. The microphone arrays comprise parallel-connected electret sound transducers which are arranged to detect sound in substantially the same direction.
Description
I
MICROPHONE ASSEMBLY
Technical Field of the Juvention
This invention relates to a microphone assembly for recording stereo and/or spatial sound.
iackground to the hwcntion Stcrco sound recording and reproduction employs acoustic projection to encode the relative position of sound sources recorded, and aims to reproduce the sound with a sense of tbosc relative positions. A stereo system can involve two or more channels, but two channels systems dominate for audio recording. [he two channels (usually known as left and right) convey information relating to sound fields located to the left and right of a listener, Many methods have been used to attempt accurately to record position and depth (spatial information). These include panning a mono microphone between left and right, using various types of microphone to the left and right, using a co-incident pair of microphones (Blumlein pair), and even using microphones that form part of a dummy head' with microphone elements in. artificial ear canals in a model of a human head.
While a. recording mad.e with a dummy head' microphone can be reproduced moderately well through headphones, reproduction through loudspeakers is less successful.
An object of embodiments of the present invention is to provide a single microphone assembly that is capable of recording spatial information in two-channel format, so that the intensity of recorded depth or spatial infornrntion may produce a superior listening experience, when compared with a recording made using a conventional two-channel microphone assembly, in that both the positioning of recorded sources and the distances within the recorded sound field may be clearly reproduced both on headphones and loudspeakers.
Smnmaiy of the Invention According to a first aspect of the present invention, there is provided a microphone assembly comprising at least one first sound transducer arranged to detect sound in a first direction, and a set of sound transducers including at least one second sound transducer arranged to detect sound in a second direction substantially perpendicular to the first direction.
The set may comprise at least on.e third sound transducer arranged to detect sound in a third direction substantially opposite to the second direction.
The set may comprise an array of said second sound transducers arranged to detect sound in the second direction. The second set may comprise an array of said third sound transducers arranged to detect sound in the third direction. The microphone assembly may comprise two or more of said first sound transducers arranged in an array arranged to detect sound in the first direction. The, or at least one, array may comprise a cluster of adjacent sound transducers.
Sound transducers in the, or at least one, array may be substantially aligned in a p'ane substantially norma.i to the direction in which they are arranged. to detect sound..
Sound transducers in the, or at least one, array may be mounted on a surface substantially noimal to the direction in which they are arranged to detect sound. Sound transducers in the, or at least one, array may be electrically connected. in parallel with the same polarity.
The microphone assembly may comprise equal numbers of said second and third transducers. The second and third transducers may be electrically connected in parallel, S the second transducers being connected with the opposite polarity to the third transducers. The microphone assembly may comprise at least two of said second transducers and at least two of said third transducers.
The microphone assembly may comprise at least two of said second transducers and al least two of said first transducers. At least half ofthe transducers maybe said first transducers, The sound transducers may be contained within a single housing unit. One or more of the transducers may be an electret microphone capsule.
According to a second aspect of the present invention, there is provided a microphone assembly comprising an array of sound transducers electrically connected in parallel and arranged to detect sound in substantially the same direction.
The sound transducers may be substantially aligned in a plane substantially normal to the direction of sound detection. The sound transducers may be mounted on a.
surface substantially normal to the direction of sound direction. The array may comprise a cluster of adjacent sound transducers. The sound transducers may be electret microphone capsules.
Detailed Description of the Invention
In order that the invention may be more clearly unde rstood embodiments thereof will now be described, by way of example only, with reference to the accompanying drawings, of which: Figure 1 is a. front elevation of a microphone assembly according to an enthodiment of the present invention; Figure 2 isa side elevation of the microphonc array of Figure 1; Figure 3 is a plan view of the microphone array of Figure 1; Figure 4 is a circuit diagram showing a circuit connecting transducers in a front transducer array, according to an embodiment of the present invention; and Figure 5 is a circuit diagram showing a circuit connecting transducers in a lcft and a right transducer array, according to an embodiment of the present invention.
The microphone is in principle a sum-and-difference' type, where one (mid') element responds to all sounds, and another (side') element, or pair of opposed elements, works as a dual element responding to sounds to the left and sounds to the right at reverse polarity.
The microphone produces left and right signals by combining the outputs of the two elements via art electroni.e sum-and-difference.' matrix. This may be achieved using software or hardware, and this signal processing may occur within the microphone unit or externally.
The mid element can be thought of as left plus right' (L + R), as it is receptive to all sounds, or to sounds arriving from a wide central area that spans the left, right, and
S
centre directions. The side element can be considered as left minus right' (U -R,as it is receptive to sound.s arriving from the left and right directions, one of which is transduced in reverse polarity (i.e. phase reversed) relative to the other.
The matrix performs a sum-and-difference ftinction where the sum of the mid and side signals (J. + K) + (L -R) resolves to 2 L, and their difference (U ± K) -(U -R) resolves to 2 R, thus producing a left signal and a right signal.
As shown ill Figures 1 to 3, the microphone consists of a front-facing array (1) of five electret microphone capsules (4) arranged close together to be sensitive to sounds from the front of the microphone, and two further side-facing arrays (2, 3), each of two electret microphone capsules arranged at or close to 90 degrees relative to the front array (1), arranged to be sensitive to sounds from the left * and right sides of the microphone.
The elcetret micro hone capsules (4) are nominally omni-direetional. In a preferred embodiment, multiple identical electret microphonc capsules are used in all of the arrays.
Alternatively, other types of sound transducer or directional microphone may be used.
For example, each array may comprise one or more cardioid or bidirectional microphones. A combination of different electret capsule sizes may be used. For example, multiple capsules of one size in the front-facing array and multiple capsules of another, smaller size in the side-facing arrays.
The eiectrct capsules of each array are arranged in a planar configuration by athching them to a respective surface of a square-U-shaped plate (5). Other suitable attachment surfaces may be used, wl.ere sound transducers in the side-facing arrays are attached to side-facing surfaces that are substantially oppoite-faeing and substantially perpendicular to a front-facing surface to which the front-facing transducers are attached.
For example, sound transducers may be attached to faces of a T-shaped or L-shaped plate, or a substantially cuboidal box or block.
Whilst in the illustrated embodiment, the left and right arrays (2, 3) each have two elettret capsules (4) and the front army (I) has five, as shown in Figures 1 to 3, any number of electret capsules may be used in each array, although the left and right arrays are preferably identical or symmetrical to one another.
The electret capsules in each array are wired in parallel. The front array eiectret capsules are all connected in parallel wUb (he same polarity, as in the circuit shown in Figure 4. The electret capsules in each of the left and right arrays are connected in parallel within the same circuit, but electret capsules in the left array (2) are wired with the opposite polarity to those in the right array (3), as illustrated in Figure 5. The electret capsules in the left array are connected in parallel between the positive (V+) and neutral (V0) terminals of the phantom-powered microphone input/output, while those in the right array are connected. in parallel between the negative (V) and neutral (V0) terminals.
Other suitable circuits that achieve asimilar effect may be used, as would be apparent to the skilled person.
An effect of the clustering of multiple parallel-connecied electret capsules per array is that each array emulates a single microphone diaphragm of a similar diameter to the distance across the array of electret capsules. As a result, the circuit connected to the front array produces a mid' (M) audio signal and the circuit connecting the left and right arrays produces a side' (S) audio signal approximating that detected by mid-side (M-S) microphone pairs. in further embodiments of the present invention, a single cluste red or dispersed any of relatively small and/or inexpensive elcctret capsules that are electrically comiected in parallel is used as a single sound transducer, sith behaviour that approximates a single microphone diaphragm, ribbon, or electret capsule of a. similar size to the distance across the clustered or dispersed array.
In certain embodiments, the left and right array's are separated by a selected S distance. Th.i.s results in a sinai! time delay for sound.s from the left side to reach the right array and vice versa, which may improve the spatial depth of the recorded sound. in one embodiment, the distance separating the left and right arrays is 100-200 mm, to approxirnatc the breadth of a human head. In another, a separation of 50-100 mm is used, to approximate the distance between the human inner ears. In an embodiment suitable as a studio microphone, a separation of 20-50mm provides a convenient balance of compact size and spatial depth. A further compact embodiment more suitable for discreet or portable use has a left-right separation of 10-20 mm.
In addition to the spacing of the lefi and right arrays, the distance across each array may be sufficient for phase differences between electret capsule signals to cause interference and cancellations in the signal. the size of each array in the illustrated embodiment is such tiat the interference and cancellations primarily affect mid. to high audio frequencies. So, the sensitivity of the front arrayto thid or high frequencies varies depending on the direction from which the sound originates. Similar effects may be seen on the side' signal derived from the left and right arriys. These effects may also cause further interfejtnce and cancellations when the mid' and sid& sign: als are combh ed. to form left and right stereo signals. Any one of these effects, or any combination of these effects, may further enhance the ability of the microphone to capture source direction and spatial distance during recording, and/or may provide an enhanced impression of depth and spaceto the listener upon playback.
As previously explained, the mid and sid.e sials from the arrays are used to derive discrete left and right stereo electronic signals via a sum-and-difference matrix function. In a preferred embodiment, this is a function of circuitry included within the microphone unit. In other embodiments, this is the function of an external signal processing unit provided for connection to the microphone, either by means of soñware or hardware, in thrther embodiments, this function is carried out remotely using a computer or mixing desk to which the microphone is connected via the mid and side audio output channels. In some embodiments, cabling connected to the microphone conveys the derived left' and right' stereo channel signals, while in others mid' and side' channel signals may be directly conveyed; alternatively, a switch may be provided to allow the user to select either of these two signal pairs.
The above embodiments are described by way of example only. Many variations are possible without depam ting from the scope of the invention as defined in the appended claims.
Claims (3)
- <claim-text>CLAIMS1. A microphone assembly comprising: at least one first sound transducer arranged to detect sound in a first direction; and a set of sound transducers. including at least one second sound transducer arranged to detect sourd in a second direction substantially perpendicular to the firsi direction.</claim-text> <claim-text>2. A microphone assembly according to claim I wherein the set comprises at least one third sound transducer arranged to detect sound in a third direction substantially opposite to the second direction.</claim-text> <claim-text>3. A microphone assembly according to claim 1 or claim 2 wherein the set comprises an array of said second sound ansducers arranged to detect sound in the second direction.</claim-text> <claim-text>4. A microphone assembly according to claim 2, or claim 3 when dependent on claim 2, wherein the set comprises an ar ay of said third sound transducers arranged to detect sound in the third direction.</claim-text> <claim-text>5. A microphone assembly according to any preceding claim comprising two or more of said first sound transducers aiTangd in an array arranged to detect sound in the first direction 6. A microphone assembly according to any of c1aim 3 to 5 wherein the, or at least one, array comprises a cluster of adjacent sound transducers.7. A microphone assembly according to any of claims 3 to 6 wherein sound transducers in the, or at least one, array are substantially aligned in a plane substantially normal to the direction in which they are arranged to detect sound.8. A microphone assembly according to any of claims 3 to 7 wherein. sound transducers in the, or at least one, array are mounted on a surface substantially noimal to the direction in which they are arranged to detect sound.9. A microphone assembly according to any of claims 3 to 8 wherein sound transducers in the, or at least onc, array are electrically connected in parallel with the same polarity.10. A microphone assembly according to claim 2, or any of claims 3 to 9 when dependent on claim
- 2. comprising equal. ni.imhers of said second and third transducers.11. A microphone assembly according to claim 4 when dependent on claim 3, wherein said second and third transducers are electrically connected in parallel, the second transducers being connected with the opposite polarity to the third transducers.12. A microphone assembly according to claim 2, or any of claims 3 to 1 lwhen dependent on claim 2, c&mprising at least two of said second transducers and. at least two of said third transducers.5]
- 3. A microphone assembly according to any preceding claim comprising at least two of said second transducers and at least two of said first transducers.14. A microphone assembly accotding to any preceding claim wherein at least half of the transducers are said fiSt transducers.15. A microphone assembly according to any preceding claim wherein the sound transducers are all contained within a single housing unit.16. A microphone assembly according to any preceding claim wherein, one or more of the transducers is an electret microphOne capsule.17. A microphone assembly comprising an array of sound transducers electrically connected in parallel and arrahged to detect sound in substantially the same direction.18. A microphone assembly according to claim 17 wherein the sound transducers are substantially aligned in a plane substantially normal to the dircction of sound detection. H 1219. A microphone assembly according to claim 17 or 18 wherein the sound transducers are mounted on a surface substantially normal to the direction of sound directIon, - 20. A microphone assembly according to any one of claims 17 to 19 wherein the array comprises a cluster of adjacent sound transducers.21. A microphone assembly according to ny one of claims 17 to 20 wherein the sound transducers are electret microphone capsules.22. A microphone assembly substantially as hcrein described with reference to the accompanying figures.</claim-text>
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1106320.3A GB2494849A (en) | 2011-04-14 | 2011-04-14 | Microphone assembly |
| PCT/GB2012/050814 WO2012140435A1 (en) | 2011-04-14 | 2012-04-13 | Microphone assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1106320.3A GB2494849A (en) | 2011-04-14 | 2011-04-14 | Microphone assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201106320D0 GB201106320D0 (en) | 2011-06-01 |
| GB2494849A true GB2494849A (en) | 2013-03-27 |
Family
ID=44147008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1106320.3A Withdrawn GB2494849A (en) | 2011-04-14 | 2011-04-14 | Microphone assembly |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2494849A (en) |
| WO (1) | WO2012140435A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9554207B2 (en) | 2015-04-30 | 2017-01-24 | Shure Acquisition Holdings, Inc. | Offset cartridge microphones |
| US9565493B2 (en) | 2015-04-30 | 2017-02-07 | Shure Acquisition Holdings, Inc. | Array microphone system and method of assembling the same |
| US10367948B2 (en) | 2017-01-13 | 2019-07-30 | Shure Acquisition Holdings, Inc. | Post-mixing acoustic echo cancellation systems and methods |
| US11523212B2 (en) | 2018-06-01 | 2022-12-06 | Shure Acquisition Holdings, Inc. | Pattern-forming microphone array |
| US11297423B2 (en) | 2018-06-15 | 2022-04-05 | Shure Acquisition Holdings, Inc. | Endfire linear array microphone |
| EP3854108A1 (en) | 2018-09-20 | 2021-07-28 | Shure Acquisition Holdings, Inc. | Adjustable lobe shape for array microphones |
| US11558693B2 (en) | 2019-03-21 | 2023-01-17 | Shure Acquisition Holdings, Inc. | Auto focus, auto focus within regions, and auto placement of beamformed microphone lobes with inhibition and voice activity detection functionality |
| EP3942845A1 (en) | 2019-03-21 | 2022-01-26 | Shure Acquisition Holdings, Inc. | Auto focus, auto focus within regions, and auto placement of beamformed microphone lobes with inhibition functionality |
| WO2020191354A1 (en) | 2019-03-21 | 2020-09-24 | Shure Acquisition Holdings, Inc. | Housings and associated design features for ceiling array microphones |
| US11445294B2 (en) | 2019-05-23 | 2022-09-13 | Shure Acquisition Holdings, Inc. | Steerable speaker array, system, and method for the same |
| EP3977449B1 (en) | 2019-05-31 | 2024-12-11 | Shure Acquisition Holdings, Inc. | Low latency automixer integrated with voice and noise activity detection |
| US11297426B2 (en) | 2019-08-23 | 2022-04-05 | Shure Acquisition Holdings, Inc. | One-dimensional array microphone with improved directivity |
| US12028678B2 (en) | 2019-11-01 | 2024-07-02 | Shure Acquisition Holdings, Inc. | Proximity microphone |
| US11552611B2 (en) | 2020-02-07 | 2023-01-10 | Shure Acquisition Holdings, Inc. | System and method for automatic adjustment of reference gain |
| US11706562B2 (en) | 2020-05-29 | 2023-07-18 | Shure Acquisition Holdings, Inc. | Transducer steering and configuration systems and methods using a local positioning system |
| CN116918351A (en) | 2021-01-28 | 2023-10-20 | 舒尔获得控股公司 | Hybrid Audio Beamforming System |
| EP4460983A1 (en) | 2022-01-07 | 2024-11-13 | Shure Acquisition Holdings, Inc. | Audio beamforming with nulling control system and methods |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393270A (en) * | 1977-11-28 | 1983-07-12 | Berg Johannes C M Van Den | Controlling perceived sound source direction |
| JPH04167698A (en) * | 1990-10-29 | 1992-06-15 | Purimo:Kk | Directional microphone following up objective sound source |
| JPH05191886A (en) * | 1992-01-16 | 1993-07-30 | Matsushita Electric Ind Co Ltd | Surrounding microphone system |
| US5260920A (en) * | 1990-06-19 | 1993-11-09 | Yamaha Corporation | Acoustic space reproduction method, sound recording device and sound recording medium |
| WO1996013958A1 (en) * | 1994-10-31 | 1996-05-09 | Mike Godfrey | Global sound microphone system |
| JP2003047088A (en) * | 2001-07-31 | 2003-02-14 | Junji Nose | Stereophonic sound recording microphone unit, method for recording stereophonic sound and method for reproducing stereophonic sound |
| US20030185410A1 (en) * | 2002-03-27 | 2003-10-02 | Samsung Electronics Co., Ltd. | Orthogonal circular microphone array system and method for detecting three-dimensional direction of sound source using the same |
| US20040252849A1 (en) * | 1999-12-21 | 2004-12-16 | Johnston James David | Microphone array for preserving soundfield perceptual cues |
| WO2006118047A1 (en) * | 2005-04-27 | 2006-11-09 | Star Micronics Co., Ltd. | Microphone system |
| WO2008040991A2 (en) * | 2006-10-06 | 2008-04-10 | Craven Peter G | Microphone array |
| WO2008149747A1 (en) * | 2007-06-04 | 2008-12-11 | Yamaha Corporation | Acoustic device |
| JP2010245737A (en) * | 2009-04-03 | 2010-10-28 | Nippon Hoso Kyokai <Nhk> | Sound collector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2810786A (en) * | 1950-06-12 | 1957-10-22 | Siemens Ag | Directional microphone system |
| JPH05219590A (en) * | 1992-02-04 | 1993-08-27 | Matsushita Electric Ind Co Ltd | Stereo microphone |
| JPH07298387A (en) * | 1994-04-28 | 1995-11-10 | Canon Inc | Stereophonic audio input device |
| US20050085185A1 (en) * | 2003-10-06 | 2005-04-21 | Patterson Steven C. | Method and apparatus for focusing sound |
-
2011
- 2011-04-14 GB GB1106320.3A patent/GB2494849A/en not_active Withdrawn
-
2012
- 2012-04-13 WO PCT/GB2012/050814 patent/WO2012140435A1/en active Application Filing
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393270A (en) * | 1977-11-28 | 1983-07-12 | Berg Johannes C M Van Den | Controlling perceived sound source direction |
| US5260920A (en) * | 1990-06-19 | 1993-11-09 | Yamaha Corporation | Acoustic space reproduction method, sound recording device and sound recording medium |
| JPH04167698A (en) * | 1990-10-29 | 1992-06-15 | Purimo:Kk | Directional microphone following up objective sound source |
| JPH05191886A (en) * | 1992-01-16 | 1993-07-30 | Matsushita Electric Ind Co Ltd | Surrounding microphone system |
| WO1996013958A1 (en) * | 1994-10-31 | 1996-05-09 | Mike Godfrey | Global sound microphone system |
| US20040252849A1 (en) * | 1999-12-21 | 2004-12-16 | Johnston James David | Microphone array for preserving soundfield perceptual cues |
| JP2003047088A (en) * | 2001-07-31 | 2003-02-14 | Junji Nose | Stereophonic sound recording microphone unit, method for recording stereophonic sound and method for reproducing stereophonic sound |
| US20030185410A1 (en) * | 2002-03-27 | 2003-10-02 | Samsung Electronics Co., Ltd. | Orthogonal circular microphone array system and method for detecting three-dimensional direction of sound source using the same |
| WO2006118047A1 (en) * | 2005-04-27 | 2006-11-09 | Star Micronics Co., Ltd. | Microphone system |
| WO2008040991A2 (en) * | 2006-10-06 | 2008-04-10 | Craven Peter G | Microphone array |
| WO2008149747A1 (en) * | 2007-06-04 | 2008-12-11 | Yamaha Corporation | Acoustic device |
| JP2010245737A (en) * | 2009-04-03 | 2010-10-28 | Nippon Hoso Kyokai <Nhk> | Sound collector |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012140435A1 (en) | 2012-10-18 |
| GB201106320D0 (en) | 2011-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2494849A (en) | Microphone assembly | |
| US7149315B2 (en) | Microphone array for preserving soundfield perceptual cues | |
| US10219094B2 (en) | Acoustic detection of audio sources to facilitate reproduction of spatial audio spaces | |
| WO2012053446A1 (en) | Headphone device | |
| CN102256192A (en) | Individualization of sound signals | |
| US8050432B2 (en) | Sound system | |
| US6628787B1 (en) | Wavelet conversion of 3-D audio signals | |
| GB1437129A (en) | Method and apparatus for imparting to headphones the sound- reproducing characteristics of loudspeakers | |
| US20060044419A1 (en) | Sound generating method, sound generating apparatus, sound reproducing method, and sound reproducing apparatus | |
| US9369817B2 (en) | Broad sound field loudspeaker system | |
| US4449018A (en) | Hearing aid | |
| JP2003032776A (en) | Reproduction system | |
| CN105072540A (en) | Stereo pickup device and stereo pickup method | |
| US9020152B2 (en) | Enabling 3D sound reproduction using a 2D speaker arrangement | |
| Malham | Toward reality equivalence in spatial sound diffusion | |
| US20230362545A1 (en) | Microphone, method for recording an acoustic signal, reproduction apparatus for an acoustic signal or method for reproducing an acoustic signal | |
| KR102534802B1 (en) | Multi-channel binaural recording and dynamic playback | |
| US10149083B1 (en) | Center point stereo system | |
| Hoose | Creating Immersive Listening Experiences with Binaural Recording Techniques | |
| TW519849B (en) | System and method for providing rear channel speaker of quasi-head wearing type earphone | |
| JP3128257U (en) | Surround recording microphone | |
| KR100636167B1 (en) | Wireless Audio System Using Virtual Sound Algorithm | |
| KR200252620Y1 (en) | 5.1 channel headphone | |
| WO2024186771A1 (en) | Systems and methods for hybrid spatial audio | |
| Malham | Sound spatialisation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |