This is partially a result of the fact that animals can be more readily obtained as experimental subjects and that technics of cochlear microphonic measurement can be more easily applied to them.nPerhaps the most surprising and baffling aspect of middle ear muscle physiology is the apparent absence in man of psychologic or perceptual changes in the loudness of ordinary everyday sounds which, presumably, are suffi¬ciently high in intensity to elicit the acoustic reflex.
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