Hearing Enhancement |
From inside the book
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Page 8
... variations in air pressure that travel through the air surrounding the external ear . Most sound detectors , such as a microphone , produce output impulses or signals which vary in exact accordance with the input sound pressure changes ...
... variations in air pressure that travel through the air surrounding the external ear . Most sound detectors , such as a microphone , produce output impulses or signals which vary in exact accordance with the input sound pressure changes ...
Page 96
... pressure cycles are actually sound operated electrical valves which drive a sound generator . Sound pressure changes ... variations it contains are removed or changed , or new variations are added . Just as a circle may become an oval ...
... pressure cycles are actually sound operated electrical valves which drive a sound generator . Sound pressure changes ... variations it contains are removed or changed , or new variations are added . Just as a circle may become an oval ...
Page 156
... pressure is being generated by the instrument is called direct current . That part of the current flow which responds to the sound pressure variations being amplified is a fluctuating current . Energy supplied by the fluctuating current ...
... pressure is being generated by the instrument is called direct current . That part of the current flow which responds to the sound pressure variations being amplified is a fluctuating current . Energy supplied by the fluctuating current ...
Common terms and phrases
abnormal acoustic actual alternating amount amplifier assumed audible audible pressure audiometer becomes cause Chapter chart circuit considered contain correction creates curve decibels defective deliver depends describe desired determined direct dispenser distortion ear canal effects electrical endings enhancement exists Figure flow free field frequency response gain given hearing instrument hearing loss important increase indicate individual kind less limiting loudness maximum tolerable pressure means measured mechanism natural nerve normal normal ear observed obtained occurs octave operate output particular pass possible practical present pressure changes pressure limitation pressure wave produce proper properties pure tone range reason receiver reference relative represent residual hearing result sensitivity shown shows single sound cycles sound pressure sound pressure cycle specified speech sounds supplied Table threshold usable usually values variation varies