Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Testing of hearing aids
Patent
1997-01-13
1998-06-23
Isen, Forester W
Electrical audio signal processing systems and devices
Monitoring/measuring of audio devices
Testing of hearing aids
381151, 600 25, H04R 2900
Patent
active
057712980
ABSTRACT:
An apparatus and method for simulating a human mastoid is disclosed. The apparatus includes a diaphragm having a mass, springiness and damping means sufficient to more closely replicate the impedance of a human head bone and skin overlying the same, than prior art testing devices. In a preferred embodiment, the method includes placing the diaphragm over the central opening of an artificial ear and placing a bone conduction hearing aid on top of the diaphragm. A microphone disposed below the opening measures the sound generated by the vibration. These measurements provides an indication of whether the bone conduction hearing aid is functioning properly. The apparatus and method are not only easier to use and less expensive than prior art devices and methods, they are also as accurate, if not more accurate.
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International Electrotechnical Commission, An IEC artificial ear, of the wide band type, for the calibration of earphones in audiometry 1970.
Chanaud Robert
Davis Larry J.
Isen Forester W
Larson-Davis, Inc.
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