GB733329A - Improvements in or relating to ducts having sound-absorbing walls for the conductionof gaseous fluids - Google Patents

Improvements in or relating to ducts having sound-absorbing walls for the conductionof gaseous fluids

Info

Publication number
GB733329A
GB733329A GB3141253A GB3141253A GB733329A GB 733329 A GB733329 A GB 733329A GB 3141253 A GB3141253 A GB 3141253A GB 3141253 A GB3141253 A GB 3141253A GB 733329 A GB733329 A GB 733329A
Authority
GB
United Kingdom
Prior art keywords
sound
duct
lined
conductionof
ducts
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
GB3141253A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB733329A publication Critical patent/GB733329A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/21—Rigid pipes made of sound-absorbing materials or with sound-absorbing structure
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Duct Arrangements (AREA)
  • Exhaust Silencers (AREA)

Abstract

733,329 Silencing gaseous currents. CREMER, L. Nov. 12, 1953 [Nov. 12, 1952], No. 31412/53. Class 7(2). To absorb sound of a frequency f, a rectangular ventilation or like duct has one or both of two opposed walls lined with sound-absorbing material the wall resistance (ratio of the sound pressure on the lining surface to the velocity of sound penetration into the lining) of which is made to approximate the quantity p b f (0À91-i 0À76), where i is #-1, p is the density of the gas in the duct, and b is the spacing of the opposed walls if both are lined and double the spacing if only one is lined. Suitable linings are aluminium wool or glass wool loosely packed into the spaces between transverse partitions. To absorb more than one frequency, arrangements such as are indicated in Figs. 4 to 7 are employed, the references 2, 3 representing the duct and partitions respectively in each case.
GB3141253A 1952-11-12 1953-11-12 Improvements in or relating to ducts having sound-absorbing walls for the conductionof gaseous fluids Expired GB733329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC6660A DE977514C (en) 1952-11-12 1952-11-12 Sound absorption filter for gas pipes, especially ventilation pipes

Publications (1)

Publication Number Publication Date
GB733329A true GB733329A (en) 1955-07-06

Family

ID=7013958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3141253A Expired GB733329A (en) 1952-11-12 1953-11-12 Improvements in or relating to ducts having sound-absorbing walls for the conductionof gaseous fluids

Country Status (6)

Country Link
AT (1) AT184708B (en)
BE (1) BE529843A (en)
CH (1) CH322916A (en)
DE (1) DE977514C (en)
FR (1) FR1078851A (en)
GB (1) GB733329A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916101A (en) * 1957-02-25 1959-12-08 Israel A Naman Sound-absorbing structures
US3263771A (en) * 1964-05-21 1966-08-02 Seifert Kurt Sound absorbing pipe lining having packing with different densities
US3353626A (en) * 1963-12-09 1967-11-21 Cremer Lothar Sound absorbing ventilation conduit with side branch chambers
US3620329A (en) * 1969-12-31 1971-11-16 Glasrock Products Jet engine noise suppressor
US3712412A (en) * 1971-11-18 1973-01-23 Environeering Sound suppressing system
US3738448A (en) * 1971-12-13 1973-06-12 Bolt Beranek & Newman Sound silencing method and apparatus
US3746114A (en) * 1970-12-24 1973-07-17 Volkswagenwerk Ag Sound attenuating structure
US3795288A (en) * 1968-05-27 1974-03-05 Pall Corp Gas conduit with acoustic insulation comprising anisometric compressed and bonded multilayer knitted wire mesh composites
US3955643A (en) * 1974-07-03 1976-05-11 Brunswick Corporation Free flow sound attenuating device and method of making
US4109752A (en) * 1976-06-22 1978-08-29 Lord Corporation Muffler
US4141433A (en) * 1976-06-04 1979-02-27 Lord Corporation Sound absorbing structure
FR2446681A1 (en) * 1979-01-19 1980-08-14 Carrier Drysys Ltd Acoustic absorber for paint spray booth - has cup shaped absorbers over water and air outlet tubes between upper and lower floors
EP0029043B1 (en) * 1979-04-17 1984-11-21 Industrial Acoustics Company, Inc. Packless silencer
US5422446A (en) * 1991-03-20 1995-06-06 Fries; Arthur Panel shaped element, specifically for sound absorbing structures and a sound absorbing installation
CN103322342A (en) * 2013-06-27 2013-09-25 无锡同心塑料制品有限公司 Plastic pipeline

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220022C2 (en) * 1982-05-27 1985-04-04 Cellofoam Deutschland Gmbh, 7950 Biberach Soundproofing device for air-flow ducts in air conditioning systems and the like.
DE4340694C1 (en) * 1993-11-30 1995-02-23 Voith Gmbh J M Silencer for use in papermaking installations
DE102007045266A1 (en) * 2007-09-21 2009-04-02 Hydac Technology Gmbh Damping device, in particular pulsation damper

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916101A (en) * 1957-02-25 1959-12-08 Israel A Naman Sound-absorbing structures
US3353626A (en) * 1963-12-09 1967-11-21 Cremer Lothar Sound absorbing ventilation conduit with side branch chambers
US3263771A (en) * 1964-05-21 1966-08-02 Seifert Kurt Sound absorbing pipe lining having packing with different densities
US3795288A (en) * 1968-05-27 1974-03-05 Pall Corp Gas conduit with acoustic insulation comprising anisometric compressed and bonded multilayer knitted wire mesh composites
US3620329A (en) * 1969-12-31 1971-11-16 Glasrock Products Jet engine noise suppressor
US3746114A (en) * 1970-12-24 1973-07-17 Volkswagenwerk Ag Sound attenuating structure
US3712412A (en) * 1971-11-18 1973-01-23 Environeering Sound suppressing system
US3738448A (en) * 1971-12-13 1973-06-12 Bolt Beranek & Newman Sound silencing method and apparatus
US3955643A (en) * 1974-07-03 1976-05-11 Brunswick Corporation Free flow sound attenuating device and method of making
US4141433A (en) * 1976-06-04 1979-02-27 Lord Corporation Sound absorbing structure
US4109752A (en) * 1976-06-22 1978-08-29 Lord Corporation Muffler
US4153136A (en) * 1976-06-22 1979-05-08 Lord Corporation Muffler
FR2446681A1 (en) * 1979-01-19 1980-08-14 Carrier Drysys Ltd Acoustic absorber for paint spray booth - has cup shaped absorbers over water and air outlet tubes between upper and lower floors
EP0029043B1 (en) * 1979-04-17 1984-11-21 Industrial Acoustics Company, Inc. Packless silencer
US5422446A (en) * 1991-03-20 1995-06-06 Fries; Arthur Panel shaped element, specifically for sound absorbing structures and a sound absorbing installation
CN103322342A (en) * 2013-06-27 2013-09-25 无锡同心塑料制品有限公司 Plastic pipeline

Also Published As

Publication number Publication date
CH322916A (en) 1957-07-15
BE529843A (en) 1957-07-19
FR1078851A (en) 1954-11-24
DE977514C (en) 1966-11-03
AT184708B (en) 1956-02-25

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