DK200400124A - Mikrofonapertur - Google Patents
Mikrofonapertur Download PDFInfo
- Publication number
- DK200400124A DK200400124A DK200400124A DKPA200400124A DK200400124A DK 200400124 A DK200400124 A DK 200400124A DK 200400124 A DK200400124 A DK 200400124A DK PA200400124 A DKPA200400124 A DK PA200400124A DK 200400124 A DK200400124 A DK 200400124A
- Authority
- DK
- Denmark
- Prior art keywords
- microphones
- individual
- frequency
- microphone structure
- microphone
- Prior art date
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
- 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; DEAF-AID SETS; 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
- H04R2201/403—Linear arrays of transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
- H04R2201/405—Non-uniform arrays of transducers or a plurality of uniform arrays with different transducer spacing
-
- 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
- H04R2430/20—Processing of the output signals of the acoustic transducers of an array for obtaining a desired directivity characteristic
- H04R2430/23—Direction finding using a sum-delay beam-former
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)
Description
PATENTKRAV 1. Mikrofonstruktur til opnåelse af en hovedsagelig frekvens-uafhængig retningsvirkning med et flertal af mikrofoner placeret langs en retlinet struktur, hvor: at den retlinede struktur i det mindste er så lang som bølgelængden for den laveste frekvens, ved hvilken der ønskes en brugbar retningsvirkning. at den retlinede struktur har en første ende og en anden ende, at mikrofonerne tæt ved den første ende er beregnet på de højeste frekvenser og mikrofonerne tæt ved den anden ende er beregnet på de laveste frekvenser, at en første indbyrdes afstand Mi mellem to mikrofoner beregnet til en første frekvens fj og en anden indbyrdes afstand M2 mellem to mikrofoner beregnet til en anden frekvens f2 har følgende relation:
at signalerne fra de enkelte mikrofoner tidsforsinkes, således at der tages højde for faseforskelle forårsaget af mikrofonernes rumlige placering, at signalerne fra de enkelte mikrofoner, hver især båndpasfiltreres, idet de enkelte båndpasfiltres pasbånd og afskæringsfrekvens er tilpasset til det frekvensbånd, de enkelte mikrofoner er beregnet til, og at de enkelte båndpasfiltre er indrettet således, at amplituden af det summerede signal efter båndpasfiltrene hovedsageligt er den samme når et sinusformet testsignal benyttes, hvor amplituden for testsignalet er konstant og frekvensen for testsignalet varieres indenfor det frekvensområde, hvor mikrofonstrukturen ønskes at have en hovedsagelig frekvensuafhængig retningsvirkning. 2. Mikrofonstruktur ifølge krav 1, kendetegnet ved, at mikrofonernes indbyrdes placering er givet ud fra formlen:
hvor N er det maksimale antal mikrofoner, 1" er den n'te mikrofons placering i forhold til den ende af mikrofonstrukturen, som er bestemt for de højeste frekvenser og d er antallet af mikrofoner per oktav. 3. Mikrofonstruktur ifølge krav 1 eller 2, kendetegnet ved, at den langstrakte struktur, som de enkle mikrofoner er placeret langs, har form som en lineær spiral, en konisk spiral, en eksponentiel spiral, en helix eller andre sådanne strukturer, således at kun få eller ingen foran-placerede mikrofoner dækker akustisk for bagved-placerede mikrofoner. 4. Mikrofonstruktur ifølge ethvert af de foregående krav, kendetegnet ved, at signalerne fra de enkelte mikrofoner i mikrofonstrukturen optages før de tidsforsinkes og båndpasfiltreres og at disse signaler først på et senere tidspunkt tidsforsinkes og båndpasfiltreres til opnåelse af den ønskede retningsvirkning. 5. Mikrofonstruktur ifølge ethvert af de foregående krav, kendetegnet ved, at de individuelle mikrofoner i stedet for at blive placeret langs en langstrakt struktur bliver placeret på cirkelbuer på en flad overflade, at den indbyrdes afstand mellem de enkelte cirkelbuer svarer til den indbyrdes afstand mellem de enkelte mikrofoner i mikrofonstrukturen ifølge et af kravene 1-4, at de individuelle mikrofoner hver er tilknyttet en tidsforsinkelse, at tidsforsinkelserne benyttes til tilsyneladende at dreje og fokuserer mikrofon-strukturen mod et punkt i rummet foran mikrofonstrukturen, og at de enkelte båndpasfiltreringer foretages på de summerede signaler fra alle mikrofonerne på en cirkelbue, efter at de er blevet tidsforsinket. 6. Mikrofon struktur ifølge krav 5, kendetegnet ved, at signalerne fra de enkelte mikrofoner føres gennem flere sæt af tidsforsinkelser og båndpasfiltre til opnåelse af flere fokuseringer og retningsvirkninger.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200400124A DK176894B1 (da) | 2004-01-29 | 2004-01-29 | Mikrofonstruktur med retningsvirkning |
DK05700606.6T DK1714524T3 (da) | 2004-01-29 | 2005-01-27 | Mikrofongruppe med en frekvensuafhængig retningsvirkning |
US10/587,657 US7889873B2 (en) | 2004-01-29 | 2005-01-27 | Microphone aperture |
EP05700606A EP1714524B1 (en) | 2004-01-29 | 2005-01-27 | Microphone array having a frequency-independent directivity |
PCT/DK2005/000056 WO2005074317A1 (en) | 2004-01-29 | 2005-01-27 | Microphone aperture |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200400124A DK176894B1 (da) | 2004-01-29 | 2004-01-29 | Mikrofonstruktur med retningsvirkning |
DK200400124 | 2004-01-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK200400124A true DK200400124A (da) | 2005-07-30 |
DK176894B1 DK176894B1 (da) | 2010-03-08 |
Family
ID=34814044
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DKPA200400124A DK176894B1 (da) | 2004-01-29 | 2004-01-29 | Mikrofonstruktur med retningsvirkning |
DK05700606.6T DK1714524T3 (da) | 2004-01-29 | 2005-01-27 | Mikrofongruppe med en frekvensuafhængig retningsvirkning |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK05700606.6T DK1714524T3 (da) | 2004-01-29 | 2005-01-27 | Mikrofongruppe med en frekvensuafhængig retningsvirkning |
Country Status (4)
Country | Link |
---|---|
US (1) | US7889873B2 (da) |
EP (1) | EP1714524B1 (da) |
DK (2) | DK176894B1 (da) |
WO (1) | WO2005074317A1 (da) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EA011601B1 (ru) * | 2005-09-30 | 2009-04-28 | Скуэрхэд Текнолоджи Ас | Способ и система для направленного захвата аудиосигнала |
JP4747949B2 (ja) * | 2006-05-25 | 2011-08-17 | ヤマハ株式会社 | 音声会議装置 |
US8903106B2 (en) * | 2007-07-09 | 2014-12-02 | Mh Acoustics Llc | Augmented elliptical microphone array |
US8155346B2 (en) * | 2007-10-01 | 2012-04-10 | Panasonic Corpration | Audio source direction detecting device |
US8615097B2 (en) | 2008-02-21 | 2013-12-24 | Bose Corportion | Waveguide electroacoustical transducing |
US8351630B2 (en) * | 2008-05-02 | 2013-01-08 | Bose Corporation | Passive directional acoustical radiating |
NO332961B1 (no) | 2008-12-23 | 2013-02-11 | Cisco Systems Int Sarl | Forhoyet toroidmikrofonapparat |
US8553894B2 (en) | 2010-08-12 | 2013-10-08 | Bose Corporation | Active and passive directional acoustic radiating |
US11665482B2 (en) | 2011-12-23 | 2023-05-30 | Shenzhen Shokz Co., Ltd. | Bone conduction speaker and compound vibration device thereof |
US11589172B2 (en) | 2014-01-06 | 2023-02-21 | Shenzhen Shokz Co., Ltd. | Systems and methods for suppressing sound leakage |
US9685730B2 (en) | 2014-09-12 | 2017-06-20 | Steelcase Inc. | Floor power distribution system |
US9451355B1 (en) | 2015-03-31 | 2016-09-20 | Bose Corporation | Directional acoustic device |
US10057701B2 (en) | 2015-03-31 | 2018-08-21 | Bose Corporation | Method of manufacturing a loudspeaker |
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 |
KR20180051189A (ko) * | 2016-11-08 | 2018-05-16 | 삼성전자주식회사 | 자동 음성 트리거 방법 및 이를 적용한 음향 분석기 |
US10367948B2 (en) | 2017-01-13 | 2019-07-30 | Shure Acquisition Holdings, Inc. | Post-mixing acoustic echo cancellation systems and methods |
WO2019231632A1 (en) | 2018-06-01 | 2019-12-05 | Shure Acquisition Holdings, Inc. | Pattern-forming microphone array |
US11297423B2 (en) | 2018-06-15 | 2022-04-05 | Shure Acquisition Holdings, Inc. | Endfire linear array microphone |
EP3834200A4 (en) * | 2018-09-12 | 2021-08-25 | Shenzhen Voxtech Co., Ltd. | SIGNAL PROCESSING DEVICE INCLUDING MULTIPLE ELECTROACOUSTIC TRANSDUCERS |
EP3854108A1 (en) | 2018-09-20 | 2021-07-28 | Shure Acquisition Holdings, Inc. | Adjustable lobe shape for array microphones |
JP2022526761A (ja) | 2019-03-21 | 2022-05-26 | シュアー アクイジッション ホールディングス インコーポレイテッド | 阻止機能を伴うビーム形成マイクロフォンローブの自動集束、領域内自動集束、および自動配置 |
CN113841419A (zh) | 2019-03-21 | 2021-12-24 | 舒尔获得控股公司 | 天花板阵列麦克风的外壳及相关联设计特征 |
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 |
CN114051738A (zh) | 2019-05-23 | 2022-02-15 | 舒尔获得控股公司 | 可操纵扬声器阵列、系统及其方法 |
EP3977449A1 (en) | 2019-05-31 | 2022-04-06 | Shure Acquisition Holdings, Inc. | Low latency automixer integrated with voice and noise activity detection |
JP2022545113A (ja) | 2019-08-23 | 2022-10-25 | シュアー アクイジッション ホールディングス インコーポレイテッド | 指向性が改善された一次元アレイマイクロホン |
EP3852387A1 (en) * | 2020-01-16 | 2021-07-21 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk Onderzoek TNO | Sound detection device |
US11552611B2 (en) | 2020-02-07 | 2023-01-10 | Shure Acquisition Holdings, Inc. | System and method for automatic adjustment of reference gain |
WO2021243368A2 (en) | 2020-05-29 | 2021-12-02 | Shure Acquisition Holdings, Inc. | Transducer steering and configuration systems and methods using a local positioning system |
WO2022165007A1 (en) | 2021-01-28 | 2022-08-04 | Shure Acquisition Holdings, Inc. | Hybrid audio beamforming system |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US4696043A (en) * | 1984-08-24 | 1987-09-22 | Victor Company Of Japan, Ltd. | Microphone apparatus having a variable directivity pattern |
JPH0728470B2 (ja) * | 1989-02-03 | 1995-03-29 | 松下電器産業株式会社 | アレイマイクロホン |
US5657393A (en) * | 1993-07-30 | 1997-08-12 | Crow; Robert P. | Beamed linear array microphone system |
US5473701A (en) * | 1993-11-05 | 1995-12-05 | At&T Corp. | Adaptive microphone array |
JP3541339B2 (ja) * | 1997-06-26 | 2004-07-07 | 富士通株式会社 | マイクロホンアレイ装置 |
US6526147B1 (en) * | 1998-11-12 | 2003-02-25 | Gn Netcom A/S | Microphone array with high directivity |
US6898582B2 (en) * | 1998-12-30 | 2005-05-24 | Algodyne, Ltd. | Method and apparatus for extracting low SNR transient signals from noise |
NZ502603A (en) | 2000-02-02 | 2002-09-27 | Ind Res Ltd | Multitransducer microphone arrays with signal processing for high resolution sound field recording |
WO2001071687A2 (en) | 2000-03-17 | 2001-09-27 | The Johns Hopkins University | Phased array surveillance system |
US7092882B2 (en) * | 2000-12-06 | 2006-08-15 | Ncr Corporation | Noise suppression in beam-steered microphone array |
FR2831763B1 (fr) * | 2001-10-26 | 2004-03-19 | Get Enst | Dispositif de saisie et restitution du son utilisant plusieurs capteurs |
-
2004
- 2004-01-29 DK DKPA200400124A patent/DK176894B1/da not_active IP Right Cessation
-
2005
- 2005-01-27 US US10/587,657 patent/US7889873B2/en active Active
- 2005-01-27 EP EP05700606A patent/EP1714524B1/en active Active
- 2005-01-27 DK DK05700606.6T patent/DK1714524T3/da active
- 2005-01-27 WO PCT/DK2005/000056 patent/WO2005074317A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP1714524B1 (en) | 2012-11-28 |
DK1714524T3 (da) | 2013-03-11 |
US20090226004A1 (en) | 2009-09-10 |
DK176894B1 (da) | 2010-03-08 |
US7889873B2 (en) | 2011-02-15 |
EP1714524A1 (en) | 2006-10-25 |
WO2005074317A1 (en) | 2005-08-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PBP | Patent lapsed |
Effective date: 20150131 |