GB1143776A - - Google Patents

Info

Publication number
GB1143776A
GB1143776A GB1143776DA GB1143776A GB 1143776 A GB1143776 A GB 1143776A GB 1143776D A GB1143776D A GB 1143776DA GB 1143776 A GB1143776 A GB 1143776A
Authority
GB
United Kingdom
Prior art keywords
sound
tubes
ratio
wave
loudspeaker
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
Other languages
English (en)
Publication date
Publication of GB1143776A publication Critical patent/GB1143776A/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)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
GB1143776D Expired GB1143776A (fr)

Publications (1)

Publication Number Publication Date
GB1143776A true GB1143776A (fr) 1900-01-01

Family

ID=1759587

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1143776D Expired GB1143776A (fr)

Country Status (1)

Country Link
GB (1) GB1143776A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167010A2 (fr) * 1984-07-04 1986-01-08 GAO Gesellschaft für Automation und Organisation mbH Appareil pour mesurer le poids surfacique d'un matériau en forme de feuille

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167010A2 (fr) * 1984-07-04 1986-01-08 GAO Gesellschaft für Automation und Organisation mbH Appareil pour mesurer le poids surfacique d'un matériau en forme de feuille
EP0167010A3 (en) * 1984-07-04 1989-09-13 Gao Gesellschaft Fur Automation Und Organisation Mbh Apparatus for measuring the surface weight of sheet material

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