SE9801257D0 - Pneumatically powered speakers - Google Patents

Pneumatically powered speakers

Info

Publication number
SE9801257D0
SE9801257D0 SE9801257A SE9801257A SE9801257D0 SE 9801257 D0 SE9801257 D0 SE 9801257D0 SE 9801257 A SE9801257 A SE 9801257A SE 9801257 A SE9801257 A SE 9801257A SE 9801257 D0 SE9801257 D0 SE 9801257D0
Authority
SE
Sweden
Prior art keywords
surroundings
loudspeaker
chamber
opening
pneumatically powered
Prior art date
Application number
SE9801257A
Other languages
Swedish (sv)
Inventor
Per-Arne Wiberg
Original Assignee
Arne Wiberg
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 Arne Wiberg filed Critical Arne Wiberg
Priority to SE9801257A priority Critical patent/SE9801257D0/en
Publication of SE9801257D0 publication Critical patent/SE9801257D0/en
Priority to AU41767/99A priority patent/AU4176799A/en
Priority to EP99925504A priority patent/EP1084589B1/en
Priority to DE69920445T priority patent/DE69920445D1/en
Priority to PCT/SE1999/000586 priority patent/WO1999053720A1/en

Links

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention presented here refers to a pneumatically driven loudspeaker, comprising at least one first chamber (1, 62) having higher pressure than the surroundings and with at least one first opening (8, 61) to the surroundings. The loudspeaker in addition comprises a second chamber (2, 64) with lower pressure than the surroundings and with at least one second opening (9, 63) to the surroundings. The first and the second openings can by means of valve mechanisms (3, 65, 91, 92) alternately open and close at a selected frequency, resulting in pressure fluctuations which give rise to sound of the desired frequency. The loudspeaker according to the invention can be used in hi-fi applications as well as in active noise suppression in jet engines, in ventilation systems, in gas turbine outlets and in exhaust systems in combustion engines.
SE9801257A 1998-04-09 1998-04-09 Pneumatically powered speakers SE9801257D0 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9801257A SE9801257D0 (en) 1998-04-09 1998-04-09 Pneumatically powered speakers
AU41767/99A AU4176799A (en) 1998-04-09 1999-04-09 Pneumatically driven loudspeaker and its use
EP99925504A EP1084589B1 (en) 1998-04-09 1999-04-09 Pneumatically driven loudspeaker and its use
DE69920445T DE69920445D1 (en) 1998-04-09 1999-04-09 AIR-DRIVED SPEAKERS AND THEIR USE
PCT/SE1999/000586 WO1999053720A1 (en) 1998-04-09 1999-04-09 Pneumatically driven loudspeaker and its use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9801257A SE9801257D0 (en) 1998-04-09 1998-04-09 Pneumatically powered speakers

Publications (1)

Publication Number Publication Date
SE9801257D0 true SE9801257D0 (en) 1998-04-09

Family

ID=20410918

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9801257A SE9801257D0 (en) 1998-04-09 1998-04-09 Pneumatically powered speakers

Country Status (5)

Country Link
EP (1) EP1084589B1 (en)
AU (1) AU4176799A (en)
DE (1) DE69920445D1 (en)
SE (1) SE9801257D0 (en)
WO (1) WO1999053720A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE514782C2 (en) * 1999-12-08 2001-04-23 Saab Ab Pneumatically powered speakers
FR2808916B1 (en) * 2000-05-11 2003-08-15 Jean Laurent Peube ELECTROAEROACOUSTIC SOURCE AND SYSTEM FOR ACTIVE NOISE CONTROL
WO2015041623A1 (en) * 2013-09-20 2015-03-26 Dushko Yuriy Viktorovich The method of sound oscillations generation and the device for its implementation
CN104219608B (en) * 2014-09-15 2018-08-10 精拓丽音科技（北京）有限公司 A kind of modulation type piezoelectric speaker, speaker system and its control method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006833B1 (en) * 1978-07-03 1983-09-14 Mats Olsson Konsult Ab Low-frequency sound generator
FR2729781B1 (en) * 1995-01-23 1997-04-18 Bertin & Cie ACTIVE NOISE CONTROL DEVICE
DE19508200A1 (en) * 1995-03-10 1996-09-12 Norbert Schaefer Bass loudspeaker for hi-fi system

Also Published As

Publication number Publication date
DE69920445D1 (en) 2004-10-28
AU4176799A (en) 1999-11-01
WO1999053720A1 (en) 1999-10-21
EP1084589A1 (en) 2001-03-21
EP1084589B1 (en) 2004-09-22

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