1975-06-20
1977-07-26
Olms, Douglas W.
179 1C, H04R 2900
Patent
active
040385000
ABSTRACT:
A microphone coupler for use in performing frequency response tests on earphones of a type normally used for testing the range and condition of human hearing in which a microphone is sealingly carried. The microphone coupler is adapted to rest in position on the earphone under test and is coupled thereto with the proper force by virtue of its own weight, and it includes lip means for guiding the microphone coupler into concentric engagement between a cushion-engaging surface and an earphone to be tested with the lip means also protecting the cushion-engaging surface.
REFERENCES:
patent: 3619507 (1971-11-01), Metz
patent: 3719783 (1973-03-01), Kennedy
patent: 3725584 (1973-04-01), Kilmer et al.
"Comparable Coupler and Real-Ear Measurements on Supraaural and Insert-Type Earphones" by Bryant, in Journal of the Acoustical Society of America, vol. 52, No. 6 (part 2) 1972, pp. 1599-1606.
American National Standard Method for Coupler Calibration of Earphones, 53.7-1973.
LaRue Adrian J.
Olms Douglas W.
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