SE0000863L - Method and apparatus for producing low frequency sounds and use of such apparatus - Google Patents

Method and apparatus for producing low frequency sounds and use of such apparatus

Info

Publication number
SE0000863L
SE0000863L SE0000863A SE0000863A SE0000863L SE 0000863 L SE0000863 L SE 0000863L SE 0000863 A SE0000863 A SE 0000863A SE 0000863 A SE0000863 A SE 0000863A SE 0000863 L SE0000863 L SE 0000863L
Authority
SE
Sweden
Prior art keywords
air pulses
during
low frequency
wave shape
pulses
Prior art date
Application number
SE0000863A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE518168C2 (en
SE0000863D0 (en
Inventor
Mats Gustavsson
Original Assignee
Saab Ab
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 Saab Ab filed Critical Saab Ab
Priority to SE0000863A priority Critical patent/SE518168C2/en
Publication of SE0000863D0 publication Critical patent/SE0000863D0/en
Priority to AU2001242932A priority patent/AU2001242932A1/en
Priority to AT01915988T priority patent/ATE307374T1/en
Priority to DE60114184T priority patent/DE60114184D1/en
Priority to PCT/SE2001/000540 priority patent/WO2001069588A1/en
Priority to EP01915988A priority patent/EP1285432B1/en
Publication of SE0000863L publication Critical patent/SE0000863L/en
Publication of SE518168C2 publication Critical patent/SE518168C2/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.
SE0000863A 2000-03-16 2000-03-16 Method and apparatus for producing low frequency sounds and use of such apparatus SE518168C2 (en)

Priority Applications (6)

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
AU2001242932A AU2001242932A1 (en) 2000-03-16 2001-03-16 A method and a device for generating low frequency sound and use of the device
AT01915988T ATE307374T1 (en) 2000-03-16 2001-03-16 METHOD AND DEVICE FOR GENERATING LOW FREQUENCY SOUND AND USE OF THE DEVICE
DE60114184T DE60114184D1 (en) 2000-03-16 2001-03-16 METHOD AND DEVICE FOR PRODUCING LOW FREQUENCY SOUND AND USE OF THE DEVICE
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
EP01915988A EP1285432B1 (en) 2000-03-16 2001-03-16 A method and a device for generating low frequency sound and use of the device

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
SE0000863D0 SE0000863D0 (en) 2000-03-16
SE0000863L true SE0000863L (en) 2001-09-17
SE518168C2 SE518168C2 (en) 2002-09-03

Family

ID=20278822

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0000863A SE518168C2 (en) 2000-03-16 2000-03-16 Method and apparatus for producing low frequency sounds and use of such apparatus

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
SE518168C2 (en) 2002-09-03
SE0000863D0 (en) 2000-03-16
ATE307374T1 (en) 2005-11-15
AU2001242932A1 (en) 2001-09-24
EP1285432A1 (en) 2003-02-26
EP1285432B1 (en) 2005-10-19
DE60114184D1 (en) 2006-03-02
WO2001069588A1 (en) 2001-09-20

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Legal Events

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