A large-display sound-level meter has been constructed as an experiment in public education, the indicator is an array of lights so arranged that the sound level produced by a source is displayed as an illuminated column. In a roadside installation, motorists see a thermometer like display ahead and can compare the level produced by their own vehicles with the maximum level permitted by legislation, as shown by vehicle silhouettes. the device registers from 70-100 dba in 2-dba steps with an accuracy approximately equal to one increment of the scale.
The 'noise thermometer' : A large-display sound level meter
Journal of the Acoustical Society of America ; 51 , 6 ; 1777-1780
1972
4 Seiten, 2 Quellen
Aufsatz (Zeitschrift)
Englisch
Differential sound-level meter
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