ATE307374T1 - METHOD AND DEVICE FOR GENERATING LOW FREQUENCY SOUND AND USE OF THE DEVICE - Google Patents

METHOD AND DEVICE FOR GENERATING LOW FREQUENCY SOUND AND USE OF THE DEVICE

Info

Publication number
ATE307374T1
ATE307374T1 AT01915988T AT01915988T ATE307374T1 AT E307374 T1 ATE307374 T1 AT E307374T1 AT 01915988 T AT01915988 T AT 01915988T AT 01915988 T AT01915988 T AT 01915988T AT E307374 T1 ATE307374 T1 AT E307374T1
Authority
AT
Austria
Prior art keywords
air pulses
during
low frequency
wave shape
pulses
Prior art date
Application number
AT01915988T
Other languages
German (de)
Inventor
Mats Gustavsson
Original Assignee
A2 Acoustics Aktiebolag
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 A2 Acoustics Aktiebolag filed Critical A2 Acoustics Aktiebolag
Application granted granted Critical
Publication of ATE307374T1 publication Critical patent/ATE307374T1/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
    • H04R1/005—Details of transducers, loudspeakers or microphones using digitally weighted transducing elements
    • 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
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/04—Sound-producing devices

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Reciprocating Pumps (AREA)
  • Compressor (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transmitters (AREA)

Abstract

In a method and a device for generating or extinguishing low frequency sound having a high sound pressure, the wave shape is divided into air pulses with variable amplitude and with considerably higher frequency than that of the wanted tone. The air pulses thereby represent instantaneous values (sampling values) of the wanted wave shape which, thus, is formed by an imaginary curve connecting the amplitude values of the discrete air pulses. The air pulses are positive during one half-cycle and negative during the other half-cycle of the wave shape. The device comprises means to pump in high frequency pulses from a chamber (1) to the surroundings during a first period of time and during a second period of time high frequency air pulses are sucked into a said chamber (2) from the surroundings. The invention also relates to use of such a device, e.g., for actively extinguishing low frequency noise.
AT01915988T 2000-03-16 2001-03-16 METHOD AND DEVICE FOR GENERATING LOW FREQUENCY SOUND AND USE OF THE DEVICE ATE307374T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0000863A SE518168C2 (en) 2000-03-16 2000-03-16 Method and apparatus for producing low frequency sounds and use of such apparatus
PCT/SE2001/000540 WO2001069588A1 (en) 2000-03-16 2001-03-16 A method and a device for generating low frequency sound and use of the device

Publications (1)

Publication Number Publication Date
ATE307374T1 true ATE307374T1 (en) 2005-11-15

Family

ID=20278822

Family Applications (1)

Application Number Title Priority Date Filing Date
AT01915988T ATE307374T1 (en) 2000-03-16 2001-03-16 METHOD AND DEVICE FOR GENERATING LOW FREQUENCY SOUND AND USE OF THE DEVICE

Country Status (6)

Country Link
EP (1) EP1285432B1 (en)
AT (1) ATE307374T1 (en)
AU (1) AU2001242932A1 (en)
DE (1) DE60114184D1 (en)
SE (1) SE518168C2 (en)
WO (1) WO2001069588A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10783866B1 (en) * 2019-07-07 2020-09-22 xMEMS Labs, Inc. Sound producing device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936480B2 (en) * 1976-02-10 1984-09-04 ソニー株式会社 speaker device
US4161632A (en) * 1978-07-05 1979-07-17 Dan Sibalis Pneumatic acoustic transducer with ferromagnetic fluid valve
US4515997A (en) * 1982-09-23 1985-05-07 Stinger Jr Walter E Direct digital loudspeaker
SE462374B (en) * 1988-06-29 1990-06-18 Infrasonik Ab CONTROL-CONTROLLED MOTOR DRIVE LOW FREQUENCY SOUND GENERATOR
DE4343807A1 (en) * 1993-12-22 1995-06-29 Guenther Nubert Elektronic Gmb Digital loudspeaker array for electric-to-acoustic signal conversion
US5973999A (en) * 1997-09-29 1999-10-26 Maxwell Technologies Systems Division, Inc. Acoustic cannon

Also Published As

Publication number Publication date
AU2001242932A1 (en) 2001-09-24
SE0000863L (en) 2001-09-17
SE518168C2 (en) 2002-09-03
EP1285432B1 (en) 2005-10-19
SE0000863D0 (en) 2000-03-16
EP1285432A1 (en) 2003-02-26
DE60114184D1 (en) 2006-03-02
WO2001069588A1 (en) 2001-09-20

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Legal Events

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