Method of and apparatus for audiometrically determining the acou

Details Method of and apparatus for audiometrically determining the acou Method of and apparatus for audiometrically determining the acou

1980-01-09

1981-09-15

Howell, Kyle L.

Surgery

Truss

Pad

179 1N, 73585, 73589, A61B 512

Patent

active

042891434

ABSTRACT:
In order to determine the acoustic impedance of a human ear at various static pressures, a probe tightly fitted to the pinna of the ear transmits a short acoustic pulse with a wide frequency spectrum (such as white noise) from an electroacoustic transducer to the ear canal and receives back an acoustic response signal which a microphone converts into an electrical wave. The latter is digitized and transformed into terms of a Fourier series fed to a processor which, on the basis of similar terms stored in a memory and previously obtained with the same probe fitted to two different cylindrical calibrating cavities, derives therefrom the acoustic ear impedance at a particular air pressure. The processor also triggers an electric pulse generator, working into the electroacoustic transducer, and may progressively adjust a generator of static air pressure connected to the probe.

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Butenko, L. N. et al., Biomed. Eng., May-Jun. 1976, vol. 10, No. 3, pp. 178-179. (Publ. Jan. 1977). _
Gintsburg, B. C., et al., Biomedical Engr., vol. 9, No. 5, pp. 287-289, (Publ: May 1976). _

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