WO2007132176A1 - Wind noise rejection apparatus - Google Patents

Wind noise rejection apparatus Download PDF

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Publication number
WO2007132176A1
WO2007132176A1 PCT/GB2007/001659 GB2007001659W WO2007132176A1 WO 2007132176 A1 WO2007132176 A1 WO 2007132176A1 GB 2007001659 W GB2007001659 W GB 2007001659W WO 2007132176 A1 WO2007132176 A1 WO 2007132176A1
Authority
WO
WIPO (PCT)
Prior art keywords
elements
transducer arrangement
microphone
module
transducer
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.)
Ceased
Application number
PCT/GB2007/001659
Other languages
French (fr)
Inventor
David Herman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AUDIOGRAVITY HOLDINGS Ltd
Original Assignee
AUDIOGRAVITY HOLDINGS Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AUDIOGRAVITY HOLDINGS Ltd filed Critical AUDIOGRAVITY HOLDINGS Ltd
Priority to JP2009508470A priority Critical patent/JP5342998B2/en
Priority to KR1020087030246A priority patent/KR101422863B1/en
Priority to US12/300,356 priority patent/US8391529B2/en
Priority to CN200780017235.XA priority patent/CN101444107B/en
Priority to EP07732688.2A priority patent/EP2025194B1/en
Publication of WO2007132176A1 publication Critical patent/WO2007132176A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H04R1/086—Protective screens, e.g. all weather or wind screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/005—Circuits for transducers 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/401—2D or 3D arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/07—Mechanical or electrical reduction of wind noise generated by wind passing a microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers

Definitions

  • the present invention relates to use of electro-acoustic transducers and more particularly to an arrangement in conjunction with an electronic circuit which reduces the effects of wind noise in the case of a microphone.
  • the present invention provides an electro-acoustic transducer arrangement comprising a plurality of omni-directional transducer elements covered by a thin acoustic resistive material. The outputs of the elements are added together to provide an output signal with increased signal to noise ratio.
  • An advantage of the present invention is that there is no requirement for there to be a desired sound source present for the invention to work.
  • Fig 1 shows diagrammatically a first embodiment of microphone in accordance with the present invention
  • Fig 2 shows diagrammatically a second embodiment of a microphone in accordance with the present invention
  • Fig 3 shows a block diagram of a circuit for use with the microphone of Fig 1 or 2;
  • Fig 4 shows a block diagram of a further arrangement including modified circuitry according to the present invention.
  • Embodiments of the present invention comprise a plurality of omni-directional transducer elements.
  • An omni-directional transducer element is one where there is a single port in a housing with the diaphragm of the transducer disposed within the housing.
  • the disposition of the elements with respect to one another is not significant as the advantages of the invention can be obtained irrespective of direction the elements face with respect to the sound source, hi other words, the wind noise rejection effect is not significantly affected by the positioning of the ports of the elements with respect to the sound source nor by the direction that the wind is blowing.
  • the elements can be located on the surface of an imaginary sphere so that they are all equidistant from the desired sound source.
  • the microphones can be mounted in an enclosed container and exposed through a common hole. Furthermore, the microphones should be shielded from the wind with a thin acoustic resistive material that may surround them or at least placed over the exposed hole(s) common to all microphone elements. This material can be thin felt or acoustic foam similar to that used to cover the ear pieces of headphones. The material should not significantly adversely affect the frequency response of the elements.
  • this shows an arrangement which comprises two omnidirectional transducer elements A and B covered with a layer of acoustic resistive material 10 which may be thin felt or acoustic foam similar to that used to cover the ear pieces of headphones.
  • the material 10 does not affect the frequency response of the elements A and B.
  • the outputs of the elements A and B are added together (not subtracted).
  • the ports a,b of the elements A and B face in very different directions but yet do not affect the performance of the arrangement.
  • Fig 2 If one considers Fig 2, three omni-directional microphone elements are present and are disposed relative to each other so that they are physically in three dimensions and may be pointing at a common sound source.
  • the elements are covered with material 10 as in Fig. 1.
  • the B and D elements in Fig 1 are physically disposed in the same plane but the ports of the elements B and D point generally at a zone containing the sound source, hi other words, the ports of the two elements are in the same plane but at different angles.
  • the middle element C is physically above the plane as the elements B and D but it is tilted. Thus, it is pointing at the zone containing the sound source.
  • Fig 3 it will be seen that with the arrangement of microphone elements shown in Figs 1 and 2, it is possible to arithmetically add the outputs of all the microphone elements and there may be two or more.
  • the electrical outputs can be added together in any convenient manner with equal signal weighting or gain using any suitable analogue or digital procedure such as digital signal processing.
  • the preferred embodiment utilises three omni-directional microphones, more than three microphone elements may be used.
  • the omni-directional elements may be located within a housing provided with or formed by a layer of acoustic resistant material.
  • the elements may be located in a case with one or more holes, in which case only the holes need be covered with a layer of acoustic resistive material.
  • this material may be of a very thin variety such as that normally associated with headphones and therefore not burden the practical manufacturability of the invention.
  • the microphone elements will be mounted in some manner so that array is in a relatively fixed position with respect to the desired sound source, hi the case of a microphone for use with a person, the microphone could be attached to the end of a boom which itself is part of an ear piece or headset. Alternatively, the microphone could be mounted in a helmet which may have an oxygen feed acting as an internal source of unwanted wind noise, or it could be used to replace the existing microphone in existing outside broadcast arrangements where the microphone is located within a cage which is arranged to be held against the face of a user with the microphone itself spaced from the user's mouth by a distance. Applications include wired or Bluetooth PHF (Personal Hands Free) for use with a mobile phone. The microphone may be used with a digital or video camera such that the desired sound is coming from approximately in front of the camera. The people speaking may be non-stationary or moving without affecting the desired affect wind noise rejection.
  • Bluetooth PHF Personal Hands Free
  • the microphone elements described in relation to Fig. 1 and 2 will enhance any sound whether or not the desired sound source is physically located in front of a port of one or more of the elements.
  • precise location of the microphone with respect to, say, the mouth is not required and it has been found that an array of microphone elements as described in relation to Fig 1 or Fig. 2 will function satisfactorily even if the array is dangling near a suitable sound source and consequently receiving only off-axis signals.
  • Fig 4 shows a block diagram of a microphone array with electronic circuitry for carrying out signal processing if such is desired for any particular application e.g. should one or more of the elements be producing an inappropriate signal and it be desired to exclude it
  • the microphone elements B,C and D are shown covered by a common thin layer of acoustic resistive foam material 50.
  • the outputs of the elements are fed to a selector circuit 51 where the signals are compared and the signal from the worst affected element is inhibited. Thereafter, the signals are fed through level and frequency control circuits 52, signal conditioning circuits 53 and then added together and fed to an output 55 after processing in a filter circuit 54 which applies band pass filtering below 200Hz. Other notch and band pass filtering can be provided to compensate for slight low frequency drop off in the voice frequency band.
  • the array of microphone elements replaces a conventional microphone and thus can be used as a direct replacement for such a microphone by being incorporated into equipment during manufacture. This may be achieved by incorporating the microphone elements and the associated signal addition circuitry as components of the larger equipment during manufacture. Alternatively, the microphone elements could be packaged in such convenient manner with or without their associated signal addition circuitry and provided to manufacturers as a module.
  • the array of omni-directional transducer elements may be mounted in a housing which may be waterproof but is provided with an array of perforations covered by a thin layer of acoustic resistive material.
  • the housing may be provided with means for attaching the array of elements to another piece of equipment on a user, e.g. by means of a spring clip.
  • the present invention has wide application either as component parts of a larger piece of equipment or as a module for the larger equipment. To give some indication of the various applications, a number of different implementation will now be described. This is not an exhaustive list.
  • One implementation is to replace an outside broadcast microphone as indicated previously. Another is to replace the microphone in a mobile phone or part of a personal hands-free kit for a mobile phone. Another is to replace the microphone in portable recording devices.
  • a further implementation is to replace the microphone in a digital camera or video camera, video camera-phone, or another portable communication device.
  • This can be either the microphone which is pointed at the user so that the user can comment on the scene being photographed. While the above arrangements are all disclosed with reference to wind and microphones, the same principles can be applied to other fluids such as water, in which case the transducer is normally termed a hydrophone.
  • the omni-directional transducer elements can be fabricated using semiconductor techniques which allows the array of elements to occupy very little space.
  • a MEMs microphone sometimes referred to as a SiMIC (Silicon Microphone) will require the addition of a rear aperture or apertures to enable bi-directionality.
  • miniature omni-directional microphone elements in an appropriate array permits a version of the invention to be utilised in a hearing aid that is suitable for use outdoors and in brez or windy conditions.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Pressure Sensors (AREA)

Abstract

An apparatus for reduction of wind noise comprised of an electro-acoustic transducer arrangement with at least two and preferably three omni-directional transducer elements. The exposed structure is covered with a thin layer of acoustic-resistive material. The electrical outputs of the elements are added together to provide an output signal with increased signal to noise ratio.

Description

WIND NOISE REJECTION APPARATUS
The present invention relates to use of electro-acoustic transducers and more particularly to an arrangement in conjunction with an electronic circuit which reduces the effects of wind noise in the case of a microphone.
The problem with wind noise in relation to microphones is well known and many solutions have been proposed. Such proposals have often required the use of complex signal processing equipment which increases the cost of a microphone quite considerably. Simpler solutions such as providing the microphone with a wind screen of some sort have also been proposed which can be effective, however, they are extremely bulky.
The present invention provides an electro-acoustic transducer arrangement comprising a plurality of omni-directional transducer elements covered by a thin acoustic resistive material. The outputs of the elements are added together to provide an output signal with increased signal to noise ratio.
In practice, it is preferred to use three or four elements
An advantage of the present invention is that there is no requirement for there to be a desired sound source present for the invention to work.
In order that the present invention be more readily understood, an embodiment thereof will now be described by way of example only with reference to the accompanying drawings, in which:-
Fig 1 shows diagrammatically a first embodiment of microphone in accordance with the present invention;
Fig 2 shows diagrammatically a second embodiment of a microphone in accordance with the present invention;
Fig 3 shows a block diagram of a circuit for use with the microphone of Fig 1 or 2;
Fig 4 shows a block diagram of a further arrangement including modified circuitry according to the present invention.
Embodiments of the present invention comprise a plurality of omni-directional transducer elements. An omni-directional transducer element is one where there is a single port in a housing with the diaphragm of the transducer disposed within the housing. The disposition of the elements with respect to one another is not significant as the advantages of the invention can be obtained irrespective of direction the elements face with respect to the sound source, hi other words, the wind noise rejection effect is not significantly affected by the positioning of the ports of the elements with respect to the sound source nor by the direction that the wind is blowing.
However, there may be circumstances in which the elements are positioned relative to each other such that their ports are equidistant from a desired source, hi one such arrangement, the elements can be located on the surface of an imaginary sphere so that they are all equidistant from the desired sound source. The microphones can be mounted in an enclosed container and exposed through a common hole. Furthermore, the microphones should be shielded from the wind with a thin acoustic resistive material that may surround them or at least placed over the exposed hole(s) common to all microphone elements. This material can be thin felt or acoustic foam similar to that used to cover the ear pieces of headphones. The material should not significantly adversely affect the frequency response of the elements.
Referring now to Fig. 1, this shows an arrangement which comprises two omnidirectional transducer elements A and B covered with a layer of acoustic resistive material 10 which may be thin felt or acoustic foam similar to that used to cover the ear pieces of headphones. As such, the material 10 does not affect the frequency response of the elements A and B. The outputs of the elements A and B are added together (not subtracted). It is to be noted that the ports a,b of the elements A and B face in very different directions but yet do not affect the performance of the arrangement.
If one considers Fig 2, three omni-directional microphone elements are present and are disposed relative to each other so that they are physically in three dimensions and may be pointing at a common sound source. The elements are covered with material 10 as in Fig. 1. The B and D elements in Fig 1 are physically disposed in the same plane but the ports of the elements B and D point generally at a zone containing the sound source, hi other words, the ports of the two elements are in the same plane but at different angles. The middle element C is physically above the plane as the elements B and D but it is tilted. Thus, it is pointing at the zone containing the sound source. Turning now to Fig 3, it will be seen that with the arrangement of microphone elements shown in Figs 1 and 2, it is possible to arithmetically add the outputs of all the microphone elements and there may be two or more.
The electrical outputs can be added together in any convenient manner with equal signal weighting or gain using any suitable analogue or digital procedure such as digital signal processing.
Although the preferred embodiment utilises three omni-directional microphones, more than three microphone elements may be used.
It is to be noted that the omni-directional elements may be located within a housing provided with or formed by a layer of acoustic resistant material. Alternatively, the elements may be located in a case with one or more holes, in which case only the holes need be covered with a layer of acoustic resistive material. Further, this material may be of a very thin variety such as that normally associated with headphones and therefore not burden the practical manufacturability of the invention.
One intended use is that the microphone elements will be mounted in some manner so that array is in a relatively fixed position with respect to the desired sound source, hi the case of a microphone for use with a person, the microphone could be attached to the end of a boom which itself is part of an ear piece or headset. Alternatively, the microphone could be mounted in a helmet which may have an oxygen feed acting as an internal source of unwanted wind noise, or it could be used to replace the existing microphone in existing outside broadcast arrangements where the microphone is located within a cage which is arranged to be held against the face of a user with the microphone itself spaced from the user's mouth by a distance. Applications include wired or Bluetooth PHF (Personal Hands Free) for use with a mobile phone. The microphone may be used with a digital or video camera such that the desired sound is coming from approximately in front of the camera. The people speaking may be non-stationary or moving without affecting the desired affect wind noise rejection.
It is to be emphasised that the microphone elements described in relation to Fig. 1 and 2 will enhance any sound whether or not the desired sound source is physically located in front of a port of one or more of the elements. Thus, precise location of the microphone with respect to, say, the mouth, is not required and it has been found that an array of microphone elements as described in relation to Fig 1 or Fig. 2 will function satisfactorily even if the array is dangling near a suitable sound source and consequently receiving only off-axis signals.
Fig 4 shows a block diagram of a microphone array with electronic circuitry for carrying out signal processing if such is desired for any particular application e.g. should one or more of the elements be producing an inappropriate signal and it be desired to exclude it There are many other methods for achieving this using either analog or digital solutions, hi this figure, the microphone elements B,C and D are shown covered by a common thin layer of acoustic resistive foam material 50. The outputs of the elements are fed to a selector circuit 51 where the signals are compared and the signal from the worst affected element is inhibited. Thereafter, the signals are fed through level and frequency control circuits 52, signal conditioning circuits 53 and then added together and fed to an output 55 after processing in a filter circuit 54 which applies band pass filtering below 200Hz. Other notch and band pass filtering can be provided to compensate for slight low frequency drop off in the voice frequency band.
The array of microphone elements replaces a conventional microphone and thus can be used as a direct replacement for such a microphone by being incorporated into equipment during manufacture. This may be achieved by incorporating the microphone elements and the associated signal addition circuitry as components of the larger equipment during manufacture. Alternatively, the microphone elements could be packaged in such convenient manner with or without their associated signal addition circuitry and provided to manufacturers as a module.
The array of omni-directional transducer elements, whether in modular form or not may be mounted in a housing which may be waterproof but is provided with an array of perforations covered by a thin layer of acoustic resistive material. The housing may be provided with means for attaching the array of elements to another piece of equipment on a user, e.g. by means of a spring clip. The present invention has wide application either as component parts of a larger piece of equipment or as a module for the larger equipment. To give some indication of the various applications, a number of different implementation will now be described. This is not an exhaustive list.
One implementation is to replace an outside broadcast microphone as indicated previously. Another is to replace the microphone in a mobile phone or part of a personal hands-free kit for a mobile phone. Another is to replace the microphone in portable recording devices.
A further implementation is to replace the microphone in a digital camera or video camera, video camera-phone, or another portable communication device. This can be either the microphone which is pointed at the user so that the user can comment on the scene being photographed. While the above arrangements are all disclosed with reference to wind and microphones, the same principles can be applied to other fluids such as water, in which case the transducer is normally termed a hydrophone.
Further, the omni-directional transducer elements can be fabricated using semiconductor techniques which allows the array of elements to occupy very little space. A MEMs microphone sometimes referred to as a SiMIC (Silicon Microphone) will require the addition of a rear aperture or apertures to enable bi-directionality.
Using miniature omni-directional microphone elements in an appropriate array permits a version of the invention to be utilised in a hearing aid that is suitable for use outdoors and in breezy or windy conditions.

Claims

CLAMS:
1. An electro-acoustic transducer arrangement comprising a plurality of omnidirectional transducer elements a means for receiving the outputs of the elements and for adding the outputs together, and acoustically resistive material covering at least a portion of the common volume that all the transducers are exposed to the wind.
2. A transducer arrangement according to claim 1, wherein there are at least three transducer elements located in an array forming part of an imaginary sphere or parabola.
3. A transducer arrangement according to claim 1 or 2, wherein the elements are microphone elements and are located on a boom attached to a user's head so as to be located pointing at the user's mouth.
4. A transducer arrangement according to claim 1 or 2, wherein the elements are microphone elements and are located on a helmet so as to be pointing at a user's mouth.
5. A transducer arrangement according to any one of claims 1 to 4 wherein the elements are mounted at the appropriate angle and orientation by use of an over-moulded high temperature polymer which will be placed by the standard SMT process.
6. A transducer arrangement according to any one of claims 1 to 5 wherein the plurality of elements are manufactured using semiconductor micro fabrication techniques.
7. A transducer module comprising a housing within which is provided a transducer arrangement as claimed in any of the preceding claims, wherein an outer surface of the housing is semi-permeable in one direction and is waterproofed.
8. A module as claimed in claim 7, wherein an array of perforations is provided in said waterproofing housing adjacent to each microphone.
9. A module as claimed in claim 8 is adjustable in direction all planar direction normal to the microphone face, the said orientation is fully adjustable, and self positions with' adequate friction.
10. A module as claimed in any one of claims 7, 8 or 9 wherein mounting means are provided in the form of an over-moulded package.
11. A module according to claim 7, wherein said waterproofing material is bonded to the rear of the microphone package and forms an elliptical core, which is in clearance of all other points.
12. A module as claimed in 7, wherein said housing is provided with a resilient snap back clip.
13. A module as claimed in any one of claims 7 to 12 wherein electrical connections and said transducer arrangement are secured electrically in the other equipment.
14. A camera incorporating a transducer arrangement according to any one of the preceding claims.
15. A portable communication device incorporating a transducer arrangement or module according to any one of the claims 1 to 13.
16. A portable communication device according to claim 15, wherein the device communicates data, as well as sound.
17. A hearing aid incorporating a transducer arrangement according to claim 6.
18. A recording device incorporating a transducer arrangement or module according to any one of claims 1 to 13.
PCT/GB2007/001659 2006-05-12 2007-05-04 Wind noise rejection apparatus Ceased WO2007132176A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2009508470A JP5342998B2 (en) 2006-05-12 2007-05-04 Wind noise elimination device
KR1020087030246A KR101422863B1 (en) 2006-05-12 2007-05-04 Electroacoustic transducer devices, transducer modules, cameras, portable communication devices, hearing aids and recording devices
US12/300,356 US8391529B2 (en) 2006-05-12 2007-05-04 Wind noise rejection apparatus
CN200780017235.XA CN101444107B (en) 2006-05-12 2007-05-04 Wind Noise Removal Device
EP07732688.2A EP2025194B1 (en) 2006-05-12 2007-05-04 Wind noise rejection apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0609416.3A GB0609416D0 (en) 2006-05-12 2006-05-12 Wind noise rejection apparatus
GB0609416.3 2006-05-12

Publications (1)

Publication Number Publication Date
WO2007132176A1 true WO2007132176A1 (en) 2007-11-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/001659 Ceased WO2007132176A1 (en) 2006-05-12 2007-05-04 Wind noise rejection apparatus

Country Status (8)

Country Link
US (1) US8391529B2 (en)
EP (1) EP2025194B1 (en)
JP (1) JP5342998B2 (en)
KR (1) KR101422863B1 (en)
CN (1) CN101444107B (en)
GB (1) GB0609416D0 (en)
TW (1) TWI468023B (en)
WO (1) WO2007132176A1 (en)

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WO2009071896A1 (en) * 2007-12-03 2009-06-11 David Herman Apparatus for accurate ambient noise sensing and reduction in the presence of wind
JP2010130415A (en) * 2008-11-28 2010-06-10 Sony Corp Audio signal reproducer
US8600073B2 (en) 2009-11-04 2013-12-03 Cambridge Silicon Radio Limited Wind noise suppression
US8861745B2 (en) 2010-12-01 2014-10-14 Cambridge Silicon Radio Limited Wind noise mitigation
EP3168309A1 (en) 2015-11-10 2017-05-17 Lifecodexx AG Detection of foetal chromosomal aneuploidies using dna regions that are differentially methylated between the foetus and the pregnant female

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US20110103634A1 (en) * 2009-11-02 2011-05-05 Blueant Wireless Pty Limited System and method for mechanically reducing unwanted wind noise in an electronics device
US20110105196A1 (en) * 2009-11-02 2011-05-05 Blueant Wireless Pty Limited System and method for mechanically reducing unwanted wind noise in a telecommunications headset device
JP2011147103A (en) 2009-12-15 2011-07-28 Canon Inc Audio signal processing device
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US8391529B2 (en) 2013-03-05

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