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HEARING AND NOISE
TRANSMISSION SYSTEMS AND INSTRUMENTS
2 other sections not shown
acoustical absorp acoustical impedance acoustical reflection acoustical stiffness acoustical system ance British Standards Institution centimetre per second chromatic scale chromatic semitone COMMON CHORD component conductor decibels DEFINITION diaphragm dyne per sq electro-acoustic transducer operat equal temperament equivalent absorption equivalent loudness filter which introduces given frequency Glossary hearing loss incident sound instantaneous values introduces negligible attenuation logarithm loud-speaker depending magnitude major scale mechanical impedance medium microphone depending minor third musical effect musical interval N.B.—The term noise NORMAL THRESHOLD octave operation Peak Value perfect fifth period pitch interval progressive wave pure tone quantity reactance reflection factor REVERBERATION ABSORPTION scale of equal simple source sinusoidal SOUND ENERGY DENSITY SOUND ENERGY FLUX sound intensity sound is completely sound particle-velocity sound pressure source of sound specified conditions specified frequency standard tone stiffness reactances SUB-SECTION subjective quality surface or material Symbol threshold of audibility tion transmitting or reproducing unit unit-area impedance wave form