Lectures Presented at the Inservice Training Course on the Acoustical Spectrum: Sound, Wanted and Unwanted, February 5-8, 1952 |
Contents
THE ACOUSTICAL SPECTRUM | 7 |
THE MEASUREMENT OF SOUND | 27 |
USE OF INSTRUMENTS AND INTERPRETATION OF DATA IN NOISE MEASUREMENT | 37 |
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Common terms and phrases
absorption coefficient acoustic trauma air-borne analyzer Anti-Noise audiograms audiometric auditory average bone cause cochlea curve cycles per second decibels Detroit duct effects of noise endolymphatic Engineer equipment exposure factors floor frequency range Health hearing loss impact industrial deafness Industrial Hygiene industrial noise inner ear instrument intensity level isolators laboratory loudness machine material measured mechanism Medical membrane ment method Michigan microphone middle ear motion Motors Corporation muscle nerve noise level noise reduction noisy normal occupational deafness octave band operation organ of Corti ossicles Otolaryngology over-all produced quency quiet reduced reflected sound Research reverberation Rochelle salt scala shown in Fig shows sound energy sound intensity sound pressure level sound waves sound-level meter spectrum speech standards stapes surface tion tissue tone transmission loss transmitted tympanic ultrasonic ultrasound velocity vestibular vibration wall workmen's compensation York