Method and apparatus for measuring stimulated acoustic reflex la

Details Method and apparatus for measuring stimulated acoustic reflex la Method and apparatus for measuring stimulated acoustic reflex la

1977-09-02

1980-05-06

Michell, Robert W.

Surgery

Truss

Pad

179 1N, A61B 512

Patent

active

042012252

ABSTRACT:
In a hearing test apparatus, a continuous tone of constant frequency is applied to one ear of a patient. A second tone is initiated in an ear of the patient and the resulting response of the intra-aural muscles is detected by measuring the change in ear canal compliance. A clock circuit measures the time period from the input of the second frequency tone to the point of response of the intra-aural muscles. This reflex latency time provides an objective measurement useful in evaluating a patient's hearing ability.

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patent: 4079198 (1978-03-01), Bennett
Hooper, R. E., "Electrocochleography," Surgical Forum, vol. 23, 1972, pp. 475-476.
Krogh, H. J., "The Concept of a Portable & Programmable Tape-Recorder Equipment for use with Electric Response Audiometry," MBEC, vol. 15, pp. 179-183, Mar. 1977.
Guillet, R. et al., "Digital Latencymeter," MBEC, vol. 15, pp. 202-204, Mar. 1977.
Stepanain, H., "Recording in 3D-II," Aust. Elect. Engr., Jan. 1975.
Bird, R., "Computer-Controlled System for Recording Modification & Presentation of Two-Channel Musical Stimuli," Behav. Research Maths & Instr.," vol. 8, No. 1, pp. 24-28, Feb. 1976.

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