GB1501441A – Sound attenuating devices
– Google Patents
GB1501441A – Sound attenuating devices
– Google Patents
Sound attenuating devices
Info
Publication number
GB1501441A
GB1501441A
GB3056/75A
GB305675A
GB1501441A
GB 1501441 A
GB1501441 A
GB 1501441A
GB 3056/75 A
GB3056/75 A
GB 3056/75A
GB 305675 A
GB305675 A
GB 305675A
GB 1501441 A
GB1501441 A
GB 1501441A
Authority
GB
United Kingdom
Prior art keywords
sound
conduit
housing
attenuating
wall
Prior art date
1974-02-01
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
GB3056/75A
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.)
Brunswick Corp
Original Assignee
Brunswick Corp
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.)
1974-02-01
Filing date
1975-01-23
Publication date
1978-02-15
1975-01-23
Application filed by Brunswick Corp
filed
Critical
Brunswick Corp
1978-02-15
Publication of GB1501441A
publication
Critical
patent/GB1501441A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
Abstract
1501441 Silencers BRUNSWICK CORP 23 Jan 1975 [1 Feb 1974] 3056/75 Heading F1B A device, for attenuating sound in a fluid when flowing therefrom, comprises a housing surrounding a conduit having an inlet and an outlet, the conduit having in series after the inlet, first means for attenuating L.F. sound entering the device, and second means for attenuating H.F. sound entering the device and consisting of a duct having a foraminous wall which has a pre-selected acoustical resistance to the passage therethrough of H.F. sound, the resistance being substantially the same value as the impedance of the flowing fluid in use of the device, the first means attenuating the L.F. sound to a level sufficiently low to enable the wall of the duct to effectively function at its pre-selected acoustical resistance. Conduit 10 is enclosed over part of its length by housing 11 which forms a low frequency (less than 500 Hz) resonator communicating with the conduit through ports 15. This section of the device reduces the level of L.F. sound to less than 120 db. The portion of the conduit 10 downstream of ports 15 has a foraminous wall and is enclosed by wall 21 to form tuned cavities the radial dimension a of which is one-quarter of the wavelength to which the cavity is tuned. The resistance to flow through the foraminous wall of the conduit is stated to be increased if L.F. sound at a level greater than 120 db is present in the gas stream and the reduction of L.F. sound levels to below this figure, by the L.F. resonator, is stated to enhance the efficiency of the second stage in reducing the level of H.F. sounds. The foraminous portion of the tube may comprise a perforated tube, metal fibre web, knitted fibre or wire, compacted fibre, foamed metals or non-metals, glass or plastics fibre, porous ceramics or combinations thereof. A preferred construction, Fig. 12, consists of a perforated tube 52 with a lining of metal, organic or ceramic fibres 54 which have a protective coating of an oxidation catalyst such as nickel, platinum, aluminium oxide or copper oxide. In a modified construction Fig. 4 (not shown) a middle frequency (500-1000 Hz) resonator is provided downstream of the H.F. attenuator. In a second modification, Fig. 6, the housing includes three L.F. resonators 41 connected to the tube by ports 37 and H.F. standing wave cavities 41. In a third modification, Fig. 8, two parallel tubes 27 are contained in housing 23 and have foraminous wall portions co-extensive with H.F. standing wave cavities 32. L.F. resonators 30 are provided at each end of the housing and there are central, middlefrequency resonators 31.
GB3056/75A
1974-02-01
1975-01-23
Sound attenuating devices
Expired
GB1501441A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US438736A
US3920095A
(en)
1974-02-01
1974-02-01
Free flow sound attenuating device and method of using
Publications (1)
Publication Number
Publication Date
GB1501441A
true
GB1501441A
(en)
1978-02-15
Family
ID=23741811
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3056/75A
Expired
GB1501441A
(en)
1974-02-01
1975-01-23
Sound attenuating devices
Country Status (6)
Country
Link
US
(1)
US3920095A
(en)
JP
(1)
JPS50127031A
(en)
CA
(1)
CA1042809A
(en)
DE
(1)
DE2504132A1
(en)
FR
(1)
FR2260059B1
(en)
GB
(1)
GB1501441A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN112233637A
(en)
*
2019-06-30
2021-01-15
青岛海尔智能技术研发有限公司
Noise reduction device and gas water heater
Families Citing this family (38)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4106587A
(en)
*
1976-07-02
1978-08-15
The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
Sound-suppressing structure with thermal relief
US4371054A
(en)
*
1978-03-16
1983-02-01
Lockheed Corporation
Flow duct sound attenuator
DE2947256C2
(en)
*
1979-11-23
1984-09-13
Messerschmitt-Bölkow-Blohm GmbH, 8000 München
Device for reducing exhaust or exhaust noise
US4601168A
(en)
*
1984-12-12
1986-07-22
Harris Harold L
Noise and emission control apparatus
DE3509033C2
(en)
*
1985-03-13
1994-05-05
Mueller Bbm Gmbh
Silencer
DE3832029C2
(en)
*
1988-09-21
1997-12-11
Wabco Gmbh
Compressed air ventilation device
US5205719A
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*
1992-01-13
1993-04-27
Copeland Corporation
Refrigerant compressor discharge muffler
DE4330129C2
(en)
*
1993-09-06
2002-08-29
Bayerische Motoren Werke Ag
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*
1993-12-11
1998-08-19
简志坚
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US6622680B2
(en)
*
2000-05-17
2003-09-23
Toyoda Gosei Co., Ltd.
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*
2000-12-01
2003-05-06
Tecumseh Products Company
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2000-12-20
2002-06-27
Quiet Storm, Llc
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US6695094B2
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*
2001-02-02
2004-02-24
The Boeing Company
Acoustic muffler for turbine engine
US6684842B1
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*
2002-07-12
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Visteon Global Technologies, Inc.
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US6799657B2
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*
2002-10-02
2004-10-05
Carrier Corporation
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US7117974B2
(en)
*
2004-05-14
2006-10-10
Visteon Global Technologies, Inc.
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US7267297B2
(en)
*
2004-09-02
2007-09-11
The Boeing Company
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US7364116B2
(en)
*
2004-09-27
2008-04-29
The Boeing Company
Automatic control systems for aircraft auxiliary power units, and associated methods
CA2583621C
(en)
*
2004-10-20
2010-12-21
Carrier Corporation
Compressor sound suppression
US7344107B2
(en)
*
2004-10-26
2008-03-18
The Boeing Company
Dual flow APU inlet and associated systems and methods
US7513119B2
(en)
2005-02-03
2009-04-07
The Boeing Company
Systems and methods for starting aircraft engines
FR2887007B1
(en)
*
2005-06-10
2009-01-23
Faurecia Interieur Ind Snc
AIR CIRCULATION CONDUIT HAVING ACOUSTIC ABSORPTION PROPERTIES
DE102005054002B4
(en)
*
2005-11-10
2021-08-12
Purem GmbH
silencer
US7765784B2
(en)
*
2006-09-25
2010-08-03
The Boeing Company
Thermally compliant APU exhaust duct arrangements and associated systems and methods
US8316813B2
(en)
*
2009-03-05
2012-11-27
GM Global Technology Operations LLC
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US8657227B1
(en)
2009-09-11
2014-02-25
The Boeing Company
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(en)
*
2010-02-11
2011-08-18
Faurecia Emissions Control Technologies, Usa, Llc
Plastic muffler with helmholtz chamber
US7992676B1
(en)
*
2010-07-21
2011-08-09
Mann & Hummel Gmbh
Compact tuned acoustic attenuation device
CN101975325B
(en)
*
2010-10-19
2012-02-01
哈尔滨工程大学
Multiply line spectrum variable frequency fluid pipe silencer
US8738268B2
(en)
2011-03-10
2014-05-27
The Boeing Company
Vehicle electrical power management and distribution
WO2014093215A1
(en)
*
2012-12-10
2014-06-19
Eaton Corporation
Resonator with liner
DE102014101144B4
(en)
*
2014-01-30
2016-10-06
Smk Systeme Metall Kunststoff Gmbh & Co. Kg.
reflection silencer
US10352210B2
(en)
2014-09-09
2019-07-16
3M Innovative Properties Company
Acoustic device
DE102017111910A1
(en)
2017-05-31
2018-12-06
Alfred Kärcher SE & Co. KG
cleaner
GB201709986D0
(en)
*
2017-06-22
2017-08-09
Univ Manchester
Apparatus for modifying acoustic transmission
US20190120414A1
(en)
*
2017-10-23
2019-04-25
Hamilton Sundstrand Corporation
Duct assembly having internal noise reduction features, thermal insulation and leak detection
US11698008B2
(en)
*
2020-02-14
2023-07-11
Tenneco Automotive Operating Company Inc.
Exhaust device
US11578687B1
(en)
*
2022-04-05
2023-02-14
Brunswick Corporation
Marine engine intake manifolds having noise attenuation
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2075263A
(en)
*
1931-10-19
1937-03-30
Maxim Silencer Co
Sound attenuating device
US3113635A
(en)
*
1959-03-31
1963-12-10
Bolt Beranek & Newman
Apparatus for silencing vibrational energy
US3362783A
(en)
*
1963-12-23
1968-01-09
Texaco Inc
Treatment of exhaust gases
US3690606A
(en)
*
1968-05-27
1972-09-12
Pall Corp
Anisometric compressed and bonded multilayer knitted wire mesh composites
US3734234A
(en)
*
1971-11-08
1973-05-22
Lockheed Aircraft Corp
Sound absorption structure
US3831710A
(en)
*
1973-01-24
1974-08-27
Lockheed Aircraft Corp
Sound absorbing panel
1974
1974-02-01
US
US438736A
patent/US3920095A/en
not_active
Expired – Lifetime
1975
1975-01-20
CA
CA218,185A
patent/CA1042809A/en
not_active
Expired
1975-01-23
GB
GB3056/75A
patent/GB1501441A/en
not_active
Expired
1975-01-31
DE
DE19752504132
patent/DE2504132A1/en
not_active
Withdrawn
1975-01-31
JP
JP50013283A
patent/JPS50127031A/ja
active
Pending
1975-01-31
FR
FR7503061A
patent/FR2260059B1/fr
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN112233637A
(en)
*
2019-06-30
2021-01-15
青岛海尔智能技术研发有限公司
Noise reduction device and gas water heater
CN112233637B
(en)
*
2019-06-30
2022-05-20
青岛海尔智能技术研发有限公司
Noise reduction device and gas water heater
Also Published As
Publication number
Publication date
FR2260059A1
(en)
1975-08-29
US3920095A
(en)
1975-11-18
DE2504132A1
(en)
1975-08-14
CA1042809A
(en)
1978-11-21
JPS50127031A
(en)
1975-10-06
FR2260059B1
(en)
1978-10-06
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Legal Events
Date
Code
Title
Description
1978-06-28
PS
Patent sealed [section 19, patents act 1949]
1985-09-18
PCNP
Patent ceased through non-payment of renewal fee
