WO1998026405A3 - Directed acoustic stick radiator - Google Patents

Directed acoustic stick radiator Download PDF

Info

Publication number
WO1998026405A3
WO1998026405A3 PCT/US1997/021598 US9721598W WO9826405A3 WO 1998026405 A3 WO1998026405 A3 WO 1998026405A3 US 9721598 W US9721598 W US 9721598W WO 9826405 A3 WO9826405 A3 WO 9826405A3
Authority
WO
WIPO (PCT)
Prior art keywords
waveguide
transformer
radiation
properties
mechanical
Prior art date
Application number
PCT/US1997/021598
Other languages
French (fr)
Other versions
WO1998026405A2 (en
Inventor
Hans-Joachim Raida
Oscar Friedrich Bschorr
Original Assignee
American Tech Corp
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 American Tech Corp filed Critical American Tech Corp
Priority to AU53630/98A priority Critical patent/AU5363098A/en
Priority to EP97950693A priority patent/EP0963681A4/en
Priority to JP52672198A priority patent/JP2001506768A/en
Publication of WO1998026405A2 publication Critical patent/WO1998026405A2/en
Publication of WO1998026405A3 publication Critical patent/WO1998026405A3/en

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
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/24—Methods or devices for transmitting, conducting or directing sound for conducting sound through solid bodies, e.g. wires
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Abstract

An elongate acoustic radiator consisting of an exciter (11), that propagates mechanical waves directly or by an adapter (12) to a mechanical waveguide. Therefore mechanical waves travel along the waveguide axed with wave velocity cw. The waves cause local displacement of transformer elements (14) coupled to the waveguide that are transformed into acoustical radiation. The waveguide is terminated with an impedance termination. Local sound radiations interfere and direct inphase radiation follows. The input impedance, the directivity characteristic, the areas of the same phase and the efficiency of the radiation can be adjusted by the points of excitation, the wave velocity, the length of the waveguide, the amplitudes of displacement, the properties of the transformer and the impedance termination. The volume of the enclosure is adjusted by the properties of the waveguide and the transformer. The device can be used as a signaling device, for speech, music or as a microphone.
PCT/US1997/021598 1996-11-26 1997-11-25 Directed acoustic stick radiator WO1998026405A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU53630/98A AU5363098A (en) 1996-11-26 1997-11-25 Directed acoustic stick radiator
EP97950693A EP0963681A4 (en) 1996-11-26 1997-11-25 Directed acoustic stick radiator
JP52672198A JP2001506768A (en) 1996-11-26 1997-11-25 Directional sound stick radiation device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19648986.5 1996-11-26
DE19648986A DE19648986C1 (en) 1996-11-26 1996-11-26 Directional rod-type acoustic radiator

Publications (2)

Publication Number Publication Date
WO1998026405A2 WO1998026405A2 (en) 1998-06-18
WO1998026405A3 true WO1998026405A3 (en) 1999-02-18

Family

ID=7812834

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/021598 WO1998026405A2 (en) 1996-11-26 1997-11-25 Directed acoustic stick radiator

Country Status (7)

Country Link
US (1) US5940347A (en)
EP (1) EP0963681A4 (en)
JP (1) JP2001506768A (en)
CN (1) CN1245005A (en)
AU (1) AU5363098A (en)
DE (1) DE19648986C1 (en)
WO (1) WO1998026405A2 (en)

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DE19628849C2 (en) * 1996-07-17 2002-10-17 Eads Deutschland Gmbh Acoustic directional emitter through modulated ultrasound
DE10043294A1 (en) * 2000-09-02 2002-03-14 Mann & Hummel Filter Electromechanical converter, in particular for installation in the intake tract of an internal combustion engine
EP1444862A1 (en) * 2001-11-07 2004-08-11 Oticon A/S Microphone unit
DE10202852B4 (en) * 2002-01-24 2011-12-22 Bundesrepublik Deutschland, vertr. d. d. Bundesministerium für Wirtschaft und Technologie, dieses vertr. d. d. Präsidenten der Physikalisch-Technischen Bundesanstalt Method for testing and / or adjusting the transmission of structure-borne noise into or out of a test specimen and structure-borne sound component
US7454030B2 (en) * 2003-08-27 2008-11-18 Graber Curtis H Subwoofer with cascaded linear array of drivers
US7324013B2 (en) 2004-11-02 2008-01-29 Preco Electronics, Inc. Safety alarm system
US7532541B2 (en) * 2006-02-23 2009-05-12 Fev Engine Technology, Inc Object detection using acoustic imaging
US7765972B2 (en) * 2006-07-21 2010-08-03 Fev Engine Technology, Inc Fully variable mechanical valve train in an internal combustion engine
CA2613821C (en) * 2007-12-07 2012-07-17 Clemente Naftali-Menajed Method and system to display a video in an email
US8351629B2 (en) * 2008-02-21 2013-01-08 Robert Preston Parker Waveguide electroacoustical transducing
US8295526B2 (en) * 2008-02-21 2012-10-23 Bose Corporation Low frequency enclosure for video display devices
US8351630B2 (en) * 2008-05-02 2013-01-08 Bose Corporation Passive directional acoustical radiating
US8081054B2 (en) * 2009-12-10 2011-12-20 Guentert Iii Joseph J Hyper-cooled liquid-filled transformer
US8265310B2 (en) * 2010-03-03 2012-09-11 Bose Corporation Multi-element directional acoustic arrays
US8553894B2 (en) 2010-08-12 2013-10-08 Bose Corporation Active and passive directional acoustic radiating
US20120113754A1 (en) 2010-11-09 2012-05-10 Eminent Technology Incorporated Active non-lethal avian denial infrasound systems and methods of avian denial
US8797045B2 (en) * 2011-03-25 2014-08-05 Doble Lemke Gmbh Device for detecting partial discharge in an insulation system of rotary electric machines
US9502632B2 (en) * 2011-05-17 2016-11-22 Dr. Hielscher Gmbh Resonator for the distribution and partial transformation of longitudinal vibrations and method for treating at least one fluid by means of a resonator according to the invention
KR101355136B1 (en) * 2012-08-14 2014-01-29 주식회사 이엠텍 Sound transducer with function of processing electric signal independently
US8873340B1 (en) * 2013-02-13 2014-10-28 The United States Of America As Represented By The Secretary Of The Navy Highly directive array aperture
US20150358768A1 (en) * 2014-06-10 2015-12-10 Aliphcom Intelligent device connection for wireless media in an ad hoc acoustic network
CN105407430B (en) * 2014-09-04 2020-07-24 宁波升亚电子有限公司 Sound effect device and manufacturing method thereof
CN104754459B (en) * 2015-03-13 2018-09-25 南京大学 The method that the directive property of low-frequency sound wave is improved using sound idol grade subarray
US10057701B2 (en) 2015-03-31 2018-08-21 Bose Corporation Method of manufacturing a loudspeaker
US9451355B1 (en) 2015-03-31 2016-09-20 Bose Corporation Directional acoustic device
WO2016170520A1 (en) 2015-04-24 2016-10-27 Socpra Sciences Et Génie S.E.C. Method and system for generating mechanical pulses
KR102322035B1 (en) 2015-07-06 2021-11-04 삼성전자주식회사 Acoustic transducer
US10244317B2 (en) 2015-09-22 2019-03-26 Samsung Electronics Co., Ltd. Beamforming array utilizing ring radiator loudspeakers and digital signal processing (DSP) optimization of a beamforming array
CN105427854A (en) * 2015-12-15 2016-03-23 湖南科技大学 Coal face active noise suppression control system
US10559294B2 (en) 2016-03-31 2020-02-11 Sony Corporation Acoustic tube and acoustic reproduction apparatus
US10284945B2 (en) * 2016-11-30 2019-05-07 Eugene Julius Christensen Air motion transformer passive radiator for loudspeaker
KR102560990B1 (en) * 2016-12-09 2023-08-01 삼성전자주식회사 Directional speaker and display apparatus having the same
US10749256B1 (en) * 2019-01-30 2020-08-18 Raytheon Company Waveguide adapter for slot antennas
KR20230024873A (en) * 2021-08-11 2023-02-21 썬전 샥 컴퍼니 리미티드 vibration sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657490A (en) * 1969-03-04 1972-04-18 Vockenhuber Karl Tubular directional microphone

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DE1132593B (en) * 1965-04-05 1962-07-05 Bolt Beranek & Newman Acoustically effective plate, especially for coupling to an electroacoustic transducer
DE2236374C3 (en) * 1972-07-25 1975-01-16 Josef Wilhelm 8725 Arnstein Manger Electroacoustic transducer system
DE2260741A1 (en) * 1972-12-12 1974-06-20 Bschorr Oskar Dr ACOUSTIC CONVERTER
JPS5037425A (en) * 1973-08-04 1975-04-08
JP2562295B2 (en) * 1985-11-19 1996-12-11 株式会社 オ−デイオテクニカ Narrow directional microphone
NL8902831A (en) * 1989-11-16 1991-06-17 Philips Nv SPEAKER SYSTEM CONTAINING A HELMHOLTZ RESONATOR COUPLED WITH AN ACOUSTIC TUBE.
EP0599250B1 (en) * 1992-11-24 2001-10-04 Canon Kabushiki Kaisha Acoustic output device, and electronic apparatus using said device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657490A (en) * 1969-03-04 1972-04-18 Vockenhuber Karl Tubular directional microphone

Non-Patent Citations (1)

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Title
See also references of EP0963681A4 *

Also Published As

Publication number Publication date
WO1998026405A2 (en) 1998-06-18
EP0963681A4 (en) 2003-07-23
DE19648986C1 (en) 1998-04-09
US5940347A (en) 1999-08-17
CN1245005A (en) 2000-02-16
AU5363098A (en) 1998-07-03
EP0963681A2 (en) 1999-12-15
JP2001506768A (en) 2001-05-22

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