GB1536164A - Acoustic attenuator - Google Patents

Acoustic attenuator

Info

Publication number
GB1536164A
GB1536164A GB1460076A GB1460076A GB1536164A GB 1536164 A GB1536164 A GB 1536164A GB 1460076 A GB1460076 A GB 1460076A GB 1460076 A GB1460076 A GB 1460076A GB 1536164 A GB1536164 A GB 1536164A
Authority
GB
United Kingdom
Prior art keywords
vanes
stage
conduit element
vane
april
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
GB1460076A
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.)
GRANDCHAMPS C
Original Assignee
GRANDCHAMPS C
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 GRANDCHAMPS C filed Critical GRANDCHAMPS C
Publication of GB1536164A publication Critical patent/GB1536164A/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
    • F16L55/027—Throttle passages
    • F16L55/02736—Throttle passages using transversal baffles defining a tortuous path

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)
  • Duct Arrangements (AREA)
  • Air-Flow Control Members (AREA)

Abstract

1536164 Silencing gaseous currents C L GRANDCHAMPS 9 April 1976 [11 April 1975] 14600/76 Heading F1B [Also in Division F4] A silencer, e.g. for insertion into an air conduit of a ventilation or exhaust system, comprises at least three stages A, B, C of deflector vanes within a conduit element 1, the vanes of each stage being disposed obliquely, e.g. at 45 degrees, to the axis Z of conduit element 1 to bring about a 90 degree change in the direction of air flowing between the stages, the downstream edges of each vane in the first or intermediate stage lying in the same plane as, and (except for the outermost vanes 2A, 2A") midway between the upstream edges of two adjacent vanes in the following stage. The length I of each vane may be of the order of 1À5 times the distance D between neighbouring vanes within a stage. The walls of conduit element 1 and the air deflecting faces of the vanes may be lined with lead foil and all surfaces may be covered with acoustic absorbent material such as glass wool which may be impregnated with resin to resist abrasion.
GB1460076A 1975-04-11 1976-04-09 Acoustic attenuator Expired GB1536164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7511416A FR2307330A1 (en) 1975-04-11 1975-04-11 ACOUSTIC ATTENUATOR, ESPECIALLY INSERABLE IN AN AIR DUCT

Publications (1)

Publication Number Publication Date
GB1536164A true GB1536164A (en) 1978-12-20

Family

ID=9153836

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1460076A Expired GB1536164A (en) 1975-04-11 1976-04-09 Acoustic attenuator

Country Status (6)

Country Link
BE (1) BE840537A (en)
ES (1) ES446879A1 (en)
FR (1) FR2307330A1 (en)
GB (1) GB1536164A (en)
IE (1) IE42550B1 (en)
IT (1) IT1058802B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20074803L (en) * 2005-03-18 2007-09-20 Tumane Entpr Ltd Device for sound attenuation of flow channel
CN112555556A (en) * 2020-10-27 2021-03-26 中国原子能科学研究院 Inverted tooth type throttling element
CN114440045A (en) * 2022-03-08 2022-05-06 公元股份有限公司 Noise-reducing energy dissipater of vertical pipe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108800517A (en) * 2018-08-29 2018-11-13 正升环境科技股份有限公司 Spread resonance muffler device and vent passages sound-attenuating system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR921160A (en) * 1945-10-31 1947-04-29 Travaux Souterrains Advanced soundproofing channel
CH335132A (en) * 1951-08-30 1958-12-31 Canadian Patents Dev Installation to damp the noise generated by a gas jet escaping from a nozzle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20074803L (en) * 2005-03-18 2007-09-20 Tumane Entpr Ltd Device for sound attenuation of flow channel
EP1878008A1 (en) * 2005-03-18 2008-01-16 Tumane Enterprises Limited A sound dampening flow channel device
US8061476B2 (en) 2005-03-18 2011-11-22 Tumane Enterprises Limited Sound dampening flow channel device
EP1878008A4 (en) * 2005-03-18 2012-04-25 Tumane Entpr Ltd A sound dampening flow channel device
CN112555556A (en) * 2020-10-27 2021-03-26 中国原子能科学研究院 Inverted tooth type throttling element
CN114440045A (en) * 2022-03-08 2022-05-06 公元股份有限公司 Noise-reducing energy dissipater of vertical pipe

Also Published As

Publication number Publication date
ES446879A1 (en) 1977-06-01
BE840537A (en) 1976-10-08
FR2307330A1 (en) 1976-11-05
IE42550B1 (en) 1980-08-27
FR2307330B1 (en) 1978-02-24
IT1058802B (en) 1982-05-10
IE42550L (en) 1976-10-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee