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November 1965

Middle Ear Muscle Influence on Binaural Hearing

Author Affiliations

From the Department of Otorhinolaryngology, the University of Michigan.

Arch Otolaryngol. 1965;82(5):478-482. doi:10.1001/archotol.1965.00760010480005

A PERSON with monaural hearing can get along quite well in this world as long as he is required only to detect and discriminateHowever, as soon as he is required to localize a sound or to rotate his attention from one fromurce to another he is at a disadvantage without two equally sensitive ears.

The ability to localize a sound source has beenuthe subject of much investigation for a number of years, and results and results1 hav catedor actual sound sources it is possible for an observer to localize various frequencies with an error of less than ten degrees fen degrees for all or a a small range centering around 1,500 cycles per second (cps). From these studies it has been revealed that two basic mechaed ms, depending upon the frequency, are involved in this localization

Those frequencies of a long wave length, relative to the distance between the two ears, encounter