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GB1117723A - Sound transmission measurement - Google Patents

Sound transmission measurement

Info

Publication number
GB1117723A
GB1117723A GB412467A GB412467A GB1117723A GB 1117723 A GB1117723 A GB 1117723A GB 412467 A GB412467 A GB 412467A GB 412467 A GB412467 A GB 412467A GB 1117723 A GB1117723 A GB 1117723A
Authority
GB
United Kingdom
Prior art keywords
chamber
sound
microphone
sample
wall portion
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
GB412467A
Inventor
Victor Terence Smith
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor 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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Priority to GB412467A priority Critical patent/GB1117723A/en
Publication of GB1117723A publication Critical patent/GB1117723A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/11—Analysing solids by measuring attenuation of acoustic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

1,117,723. Sound transmission measurement. FORD MOTOR CO. Ltd. 27 Jan., 1967, No. 4124/67. Heading H4D. In a system for measuring the sound absorption properties of a sample 14, the sample is mounted in an opening between a reverberant chamber 11, containing a sound source 31 and a microphone 32, and a chamber 12 containing a microphone 33 and having an anechoic wall portion and a reflective wall portion, means being provided for measuring the sound levels sensed by the two microphones and hence indicating absorption. The chamber walls provide sound insulation from external noise. Chamber 11 is fitted with reflecting liners 18 arranged at irregular angles to eliminate standing waves, and the anechoic wall portion of chamber 12 comprises absorbent wedges 24. The wall materials and shape in chamber 12 are such that any sound energy reflected inside chamber 12 is absorbed before it reaches microphone 33. Transmission loss through sample 14 is determined as a function of sound frequency by driving source 31 from a bandpass filtered (one third octave) random noise generator and recording the two microphone outputs, the microphone outputs being sampled alternately.
GB412467A 1967-01-27 1967-01-27 Sound transmission measurement Expired GB1117723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB412467A GB1117723A (en) 1967-01-27 1967-01-27 Sound transmission measurement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB412467A GB1117723A (en) 1967-01-27 1967-01-27 Sound transmission measurement

Publications (1)

Publication Number Publication Date
GB1117723A true GB1117723A (en) 1968-06-26

Family

ID=9771206

Family Applications (1)

Application Number Title Priority Date Filing Date
GB412467A Expired GB1117723A (en) 1967-01-27 1967-01-27 Sound transmission measurement

Country Status (1)

Country Link
GB (1) GB1117723A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184542A (en) * 1985-12-02 1987-06-24 Electromusic Limited Acoustic measuring device
EP1610123A1 (en) * 2004-06-21 2005-12-28 Carcoustics Tech Center GmbH Test bench and method for measuring the acoustic insulation characteristic of a test object
DE102012005889A1 (en) * 2012-03-23 2013-09-26 Audi Ag Device for demonstrating acoustic damping property of laminar component, particularly glass plate, such as window of motor vehicle, has fully closed housing with two chambers separated from each other over wall
US9247366B2 (en) 2012-09-14 2016-01-26 Robert Bosch Gmbh Microphone test fixture
CN109307711A (en) * 2018-11-28 2019-02-05 中车长春轨道客车股份有限公司 Test method for sound insulation performance of train through-passage based on reverberation chamber and anechoic chamber

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184542A (en) * 1985-12-02 1987-06-24 Electromusic Limited Acoustic measuring device
GB2184542B (en) * 1985-12-02 1990-08-15 Electromusic Limited Acoustic measuring device
EP1610123A1 (en) * 2004-06-21 2005-12-28 Carcoustics Tech Center GmbH Test bench and method for measuring the acoustic insulation characteristic of a test object
DE102012005889A1 (en) * 2012-03-23 2013-09-26 Audi Ag Device for demonstrating acoustic damping property of laminar component, particularly glass plate, such as window of motor vehicle, has fully closed housing with two chambers separated from each other over wall
US9247366B2 (en) 2012-09-14 2016-01-26 Robert Bosch Gmbh Microphone test fixture
CN109307711A (en) * 2018-11-28 2019-02-05 中车长春轨道客车股份有限公司 Test method for sound insulation performance of train through-passage based on reverberation chamber and anechoic chamber
CN109307711B (en) * 2018-11-28 2022-01-25 中车长春轨道客车股份有限公司 Train through passage sound insulation performance test method based on reverberation chamber and anechoic chamber

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