Acoustic duct. Researcher looking down an acoustic duct, which is used to calibrate microphones and sound level meters. The duct is nine metres long with a rockwool insulator at one end and a loudspeaker at the other. Typically, measurements can be performed over the frequency range from 31.5Hz (hertz) to 250Hz. Photographed at the National Physical Laboratory in Teddington, UK.
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Details
Creative#:
TOP03227273
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
N/A
Right to Privacy:
No
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ACOUSTICACOUSTICACOUSTICSADULTAUDIOBRITAINBRITISHCALIBRATINGCALIBRATIONCHAMBERCLAMPDEVICEDUCTECHOECHOESECHOINGEQUIPMENTHUMANKINGDOMLABLABORATORYLABORATORYLEVELMALEMANMETERMICROPHONENATIONALNORSONICNPLPEOPLEPERSONPHYSICALPHYSICALPHYSICISTPHYSICSRESEARCHERRESEARCHINGROOMSCIENTISTSOUNDSOUNDSOUNDTECHNOLOGICALTECHNOLOGYTEDDINGTONTESTTESTINGTESTSTUNNELUKUNITEDWALL
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