Differential latency audiometer

Details Differential latency audiometer Differential latency audiometer

1982-10-12

1985-05-07

Cohen, Lee S.

Surgery

Truss

Pad

179107R, 73585, A61B 512

Patent

active

045151695

ABSTRACT:
An apparatus and a method for performing differential interaural latency evaluation utilizes the ability of the human brain to locate a complex sound source. Respective stimuli are simultaneously applied to the ears of the subject. The stimulus applied to one ear is offset in time with respect to the stimulus applied to the other ear. The stimuli are perceived by the subject as being generated by a sound source inside of the subject's head at a location within the head in accordance with the interaural differential latency. The relative time offset between the stimuli can be varied until the apparent source of the stimuli is perceived by the subject as being in the vicinity of a predetermined position. The time offset is ascertained and used to generate indicia of interaural differential latency, which is displayed by an electronic display.

REFERENCES:
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patent: 4327252 (1982-04-01), Tumatis
patent: 4390748 (1983-06-01), Zwicker
"Essentials of Clinical Electric Response Audiometry", Gibson, 1978.
R. Nilsson & G. Liden, "Sound Localization with Phase Audiometry", Actua Otolaryngol 81:291-299, 1976, University of Goteborg, Goteborg, Sweden.
"Brain-Stem Electric Response Audiometry", J. Ward, Jun., 1981, vol. 34, No. 8, Hearing Aid Journal.
"Electric Response Audiometer"-TA-1000, Brochure #TA-1081, Teledyne Avionics, Charlottesville, Virginia.
"Electric Response Audiometer"-Model TA-1000, Designation No. SLZ9793C.
"Brainstem and Other Auditory Evoked Potentials, Principles, Techniques and Applications", Teter et al.

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