GB899685A - Sound-absorbing member, e.g., for ducts - Google Patents

Sound-absorbing member, e.g., for ducts

Info

Publication number
GB899685A
GB899685A GB4414559A GB4414559A GB899685A GB 899685 A GB899685 A GB 899685A GB 4414559 A GB4414559 A GB 4414559A GB 4414559 A GB4414559 A GB 4414559A GB 899685 A GB899685 A GB 899685A
Authority
GB
United Kingdom
Prior art keywords
sheet
duct
sound
members
absorbing member
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB4414559A
Inventor
Bill Gene Watters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bolt Beranek and Newman Inc
Original Assignee
Bolt Beranek and Newman Inc
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 Bolt Beranek and Newman Inc filed Critical Bolt Beranek and Newman Inc
Priority to GB4414559A priority Critical patent/GB899685A/en
Publication of GB899685A publication Critical patent/GB899685A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0336—Noise absorbers by means of sound-absorbing materials
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Duct Arrangements (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

899,685. Silencing gaseous currents. BOLT, BERANEK & NEWMAN Inc. Dec. 29, 1959, No. 44145/59. Class 7(2). A sound-absorbing member 5 for lining or positioning in a duct 2 comprises a plurality of rigid supporting members 6 having at least one of their ends covered by a thin non-selfsupporting relatively flexible porous sheet S with a resistive impedance, the spacing between the supporting members being large compared with the pores of the sheet S but small compared with the width of the free space in the duct P, the spacing being sufficiently small to provide support for the sheet S in order to prevent its sagging and flexing. As shown in Fig. 1, the U-shaped sound-absorbing member 5 comprises a honeycomb structure 6 secured at one end 13 to the inner surfaces 1, 3 of the duct 2. The cellular members 6 which may be of metal or paperboard have their free ends covered by the sheet S consisting of a synthetic plastic sheet 7, perforated at 9, laminated with inner and outer flexible porous materials 11, 11<SP>1</SP>, such as "tea-bag" paper or porous cellulose film. The sheet member 11- 7-11<SP>1</SP> may be interrupted at the crests C of the member 5 and the members 6 may be omitted in this exposed region, baffles then bounding this region. The plastic sheet 7 may be used without the sheets 11, 11<SP>1</SP> and the cellular structure may be filled with sound absorbent material. In another embodiment Fig. 10, the member 5 is formed into a helical structure disposed in a circular or oval duct 1 with the inner walls preferably lined with a circular or oval form of structure 6-11-7-11<SP>1</SP>. Specifications 720,448, 721,859, 721,860, 800,103 and 821,923 are referred to.
GB4414559A 1959-12-29 1959-12-29 Sound-absorbing member, e.g., for ducts Expired GB899685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4414559A GB899685A (en) 1959-12-29 1959-12-29 Sound-absorbing member, e.g., for ducts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4414559A GB899685A (en) 1959-12-29 1959-12-29 Sound-absorbing member, e.g., for ducts

Publications (1)

Publication Number Publication Date
GB899685A true GB899685A (en) 1962-06-27

Family

ID=10431994

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4414559A Expired GB899685A (en) 1959-12-29 1959-12-29 Sound-absorbing member, e.g., for ducts

Country Status (1)

Country Link
GB (1) GB899685A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317504A1 (en) * 1975-06-23 1977-02-04 Short Brothers & Harland Ltd SOUND ABSORBING STRUCTURE AND GAS TURBINE ENGINE INCLUDING SUCH A STRUCTURE
GB2223448A (en) * 1988-07-25 1990-04-11 Short Brothers Plc Noise attenuation panel.
EP1701028A3 (en) * 2005-02-03 2009-12-09 United Technologies Corporation Acoustic liner with a nonuniform depth backwall
CN108488531A (en) * 2018-06-01 2018-09-04 佛山市海烨精密塑料制管有限公司 A kind of draining anti-scratch can noise reduction plastic conduit
CN108953825A (en) * 2018-08-02 2018-12-07 哈尔滨工程大学 A kind of low-resistance force adaptive suction flow control device and method with noise elimination function
WO2022127843A1 (en) * 2020-12-18 2022-06-23 香港大学浙江科学技术研究院 Sound absorbing structure and sound absorbing device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317504A1 (en) * 1975-06-23 1977-02-04 Short Brothers & Harland Ltd SOUND ABSORBING STRUCTURE AND GAS TURBINE ENGINE INCLUDING SUCH A STRUCTURE
GB2223448A (en) * 1988-07-25 1990-04-11 Short Brothers Plc Noise attenuation panel.
GB2223448B (en) * 1988-07-25 1993-02-24 Short Brothers Plc Noise attenuation panel
US5543198A (en) * 1988-07-25 1996-08-06 Short Brothers Plc Noise attenuation panel
EP1701028A3 (en) * 2005-02-03 2009-12-09 United Technologies Corporation Acoustic liner with a nonuniform depth backwall
CN108488531A (en) * 2018-06-01 2018-09-04 佛山市海烨精密塑料制管有限公司 A kind of draining anti-scratch can noise reduction plastic conduit
CN108953825A (en) * 2018-08-02 2018-12-07 哈尔滨工程大学 A kind of low-resistance force adaptive suction flow control device and method with noise elimination function
WO2022127843A1 (en) * 2020-12-18 2022-06-23 香港大学浙江科学技术研究院 Sound absorbing structure and sound absorbing device

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