SE0100285L - Acoustic absorbent - Google Patents

Acoustic absorbent

Info

Publication number
SE0100285L
SE0100285L SE0100285A SE0100285A SE0100285L SE 0100285 L SE0100285 L SE 0100285L SE 0100285 A SE0100285 A SE 0100285A SE 0100285 A SE0100285 A SE 0100285A SE 0100285 L SE0100285 L SE 0100285L
Authority
SE
Sweden
Prior art keywords
membrane
porous material
loudspeaker
polymeric porous
sintered polymeric
Prior art date
Application number
SE0100285A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE522767C2 (en
SE0100285D0 (en
Inventor
Sune Gustafsson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE0100285A priority Critical patent/SE522767C2/en
Publication of SE0100285D0 publication Critical patent/SE0100285D0/en
Priority to PCT/EP2002/000642 priority patent/WO2002062099A1/en
Publication of SE0100285L publication Critical patent/SE0100285L/en
Publication of SE522767C2 publication Critical patent/SE522767C2/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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means for loudspeaker transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

A loudspeaker arrangement comprising a loudspeaker provided with a membrane and an acoustical absorbent in which a sintered polymeric porous material is provided so that an air space in the back of said membrane is separated, by the sintered polymeric porous material, from ambient air. Method of damping low frequencies of sound characterised by the separation of an air space behind a membrane of a loudspeaker from ambient air by means of sintered polymeric porous material.
SE0100285A 2001-01-31 2001-01-31 Speaker arrangement including an acoustic absorbent SE522767C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0100285A SE522767C2 (en) 2001-01-31 2001-01-31 Speaker arrangement including an acoustic absorbent
PCT/EP2002/000642 WO2002062099A1 (en) 2001-01-31 2002-01-23 Loudspeaker arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0100285A SE522767C2 (en) 2001-01-31 2001-01-31 Speaker arrangement including an acoustic absorbent

Publications (3)

Publication Number Publication Date
SE0100285D0 SE0100285D0 (en) 2001-01-31
SE0100285L true SE0100285L (en) 2002-08-01
SE522767C2 SE522767C2 (en) 2004-03-02

Family

ID=20282789

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0100285A SE522767C2 (en) 2001-01-31 2001-01-31 Speaker arrangement including an acoustic absorbent

Country Status (2)

Country Link
SE (1) SE522767C2 (en)
WO (1) WO2002062099A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2293592A1 (en) 2009-09-01 2011-03-09 Nxp B.V. Acoustic material for a small loudspeaker cabinet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127751A (en) * 1975-11-27 1978-11-28 Pioneer Electronic Corporation Loudspeaker with rigid foamed back-cavity
US4964482A (en) * 1989-02-23 1990-10-23 Meyer John E Loudspeaker enclosure
US5658656A (en) * 1992-01-10 1997-08-19 Minnesota Mining And Manufacturing Company Use of materials comprising microbubbles as acoustical barriers
US6266857B1 (en) * 1998-02-17 2001-07-31 Microsound Systems, Inc. Method of producing a backing structure for an ultrasound transceiver
DE69930188T2 (en) * 1998-11-05 2006-12-07 Matsushita Electric Industrial Co., Ltd., Kadoma Piezoelectric speaker, method of making it, and speaker system with this speaker

Also Published As

Publication number Publication date
SE522767C2 (en) 2004-03-02
WO2002062099A1 (en) 2002-08-08
WO2002062099A9 (en) 2002-10-31
SE0100285D0 (en) 2001-01-31

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Legal Events

Date Code Title Description
NUG Patent has lapsed