WO2002065447A3 - Sound absorbing foam - Google Patents

Sound absorbing foam Download PDF

Info

Publication number
WO2002065447A3
WO2002065447A3 PCT/US2002/001668 US0201668W WO02065447A3 WO 2002065447 A3 WO2002065447 A3 WO 2002065447A3 US 0201668 W US0201668 W US 0201668W WO 02065447 A3 WO02065447 A3 WO 02065447A3
Authority
WO
WIPO (PCT)
Prior art keywords
sound absorbing
absorbing foam
quarter
excess
average
Prior art date
Application number
PCT/US2002/001668
Other languages
French (fr)
Other versions
WO2002065447A2 (en
Inventor
Daniel R Schroer
Laurent Remy
Michel J Brucker
Chung P Park
Suresh Subramonian
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to AU2002237887A priority Critical patent/AU2002237887A1/en
Publication of WO2002065447A2 publication Critical patent/WO2002065447A2/en
Publication of WO2002065447A3 publication Critical patent/WO2002065447A3/en

Links

Classifications

    • 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Thermoplastic foams with an average cell size of greater than one and one-half millimeters and an average noise reduction coefficient in excess of 0.3 have improved sound attenuating properties when they include a Helmholtz resonator, a quarter-wave attenuator or both.
PCT/US2002/001668 2001-02-09 2002-01-18 Sound absorbing foam WO2002065447A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002237887A AU2002237887A1 (en) 2001-02-09 2002-01-18 Sound absorbing foam

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26753301P 2001-02-09 2001-02-09
US60/267,533 2001-02-09

Publications (2)

Publication Number Publication Date
WO2002065447A2 WO2002065447A2 (en) 2002-08-22
WO2002065447A3 true WO2002065447A3 (en) 2002-11-14

Family

ID=23019180

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/001668 WO2002065447A2 (en) 2001-02-09 2002-01-18 Sound absorbing foam

Country Status (3)

Country Link
US (1) US20020153199A1 (en)
AU (1) AU2002237887A1 (en)
WO (1) WO2002065447A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4385601B2 (en) * 2001-02-19 2009-12-16 株式会社ブリヂストン Sealing material
DE502006001958D1 (en) * 2005-08-08 2008-12-11 Alstom Technology Ltd MUFFLER FOR GAS TURBINE SYSTEMS
FR2917882B1 (en) * 2007-06-21 2009-11-27 Renault Sas ABSORBENT MATERIAL COMPRISING RESISTIVE SKIN CAVITIES AND PROCESS FOR PRODUCING SUCH MATERIAL
US20100065368A1 (en) * 2008-09-15 2010-03-18 Vatche Tazian Lightweight, flexible, moldable acoustic barrier and composites including the same
ITPI20100033A1 (en) * 2010-03-23 2011-09-24 Federico Nardini SOUND-ABSORBING DEVICE PARTICULARLY FOR ANTI-NOISE BARRIERS.
DE102010031855A1 (en) * 2010-07-22 2012-01-26 J. Eberspächer GmbH & Co. KG exhaust system
US20130280079A1 (en) * 2012-04-18 2013-10-24 Hamilton Sundstrand Corporation Propeller blade with metallic foam spar core
CN110024024B (en) * 2016-11-29 2023-05-02 富士胶片株式会社 Sound-proof structure
CN106782479B (en) * 2016-12-26 2023-05-05 贵州大学 Simple foam aluminum muffler
CN108417195B (en) * 2018-06-13 2023-11-10 山东理工大学 Medium-low frequency sound absorption metamaterial structure based on resonant cavity
CN112728275A (en) * 2020-12-19 2021-04-30 重庆大学 Non-single low-frequency ultra-open ventilation adjustable sound absorption unit
CN113129860A (en) * 2021-04-09 2021-07-16 西安建筑科技大学 Acoustic metamaterial of foamed aluminum coupled Helmholtz resonator and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132714A (en) * 1962-01-02 1964-05-12 Aerojet General Co Acoustic panel
JPH09281973A (en) * 1996-04-16 1997-10-31 Tokai Chem Ind Ltd Sound insulating structure and its manufacture, and sound insulating instrument panel
JPH10273938A (en) * 1997-03-31 1998-10-13 Tokai Rubber Ind Ltd Sound absorbing member
WO2000015697A1 (en) * 1998-09-17 2000-03-23 The Dow Chemical Company Perforated foams
US6167985B1 (en) * 1997-02-19 2001-01-02 Rieter Automotive (International) Ag λ/4 absorber with an adjustable band width

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132714A (en) * 1962-01-02 1964-05-12 Aerojet General Co Acoustic panel
JPH09281973A (en) * 1996-04-16 1997-10-31 Tokai Chem Ind Ltd Sound insulating structure and its manufacture, and sound insulating instrument panel
US6167985B1 (en) * 1997-02-19 2001-01-02 Rieter Automotive (International) Ag λ/4 absorber with an adjustable band width
JPH10273938A (en) * 1997-03-31 1998-10-13 Tokai Rubber Ind Ltd Sound absorbing member
WO2000015697A1 (en) * 1998-09-17 2000-03-23 The Dow Chemical Company Perforated foams

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 01 29 January 1999 (1999-01-29) *

Also Published As

Publication number Publication date
US20020153199A1 (en) 2002-10-24
WO2002065447A2 (en) 2002-08-22
AU2002237887A1 (en) 2002-08-28

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