Surgery – Truss – Pad
Patent
1980-02-08
1981-08-18
Nusbaum, Mark E.
Surgery
Truss
Pad
128746, H04R 2900
Patent
active
042848474
ABSTRACT:
An audiometric testing system containing a processor and programmable analog circuitry for controlling frequency and intensity of audiometric test tones communicates with a remote data processing system via a communications link. The remote data processing system stores prior audiometric records for a large number of subjects. Each day, the audiometric records of a number of selected persons are transmitted from the remote data processing system to a memory of the audiometric testing system in response to identification numbers entered by an operator. The audiometric responses of each person to patterns of sounds of varying frequencies and intensities are determined. The varying frequencies and intensities are determined by a bracketing subroutine of an algorithm stored in and executed by a processor of the audiometric testing system. A person's responses to such test tones are utilized by the bracketing subroutine to determine his threshold levels at the respective frequencies for each ear. The algorithm automatically computes the pure tone averages for each ear from the threshold levels at a plurality of predetermined frequencies. The algorithm also automatically computes the binaural hearing impairment based on test results from prior testing of the person. Any significant shift in threshold is determined by comparison with the prior test results. The audiometric testing system includes a printer which prints the persons' complete hearing test record, including relevant identifying information, present test results, pure tone averages, binaural hearing impairment, significant threshold shifts, and a recommended time for the next testing. After all persons have been tested for the day, their updated audiometric records are transmitted via the communications link to the remote data processing system.
REFERENCES:
patent: 3808354 (1974-04-01), Feezor et al.
patent: 3809811 (1974-05-01), De Lisle et al.
D. McClure, "Hear Ye", IEEE Spectrum, Mar. 1978, p. 34.
Kemeny E. S.
Nusbaum Mark E.
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