Method and device for determining acoustical transfer impedance

Details Method and device for determining acoustical transfer impedance Method and device for determining acoustical transfer impedance

2004-04-14

2009-11-10

Faulk, Devona E (Department: 2615)

Electrical audio signal processing systems and devices

Monitoring of sound

Amplification control responsive to ambient sound

C381S056000, C381S059000, C381S001000, C381S017000, C381S019000, C381S074000, C381S300000, C381S096000, C381S060000, C702S108000, C702S110000, C702S109000, C702S111000, C702S112000

Reexamination Certificate

active

07616767

ABSTRACT:
The method comprises generating an acoustical volume velocity Q in the listening position, measuring a response quantity p, such as sound or vibration, at a suspected source position resulting from the volume velocity Q, and determining the acoustical transfer impedance Ztas the response quantity p divided by the acoustical volume velocity Q, Zt=p/Q. According to the invention the acoustical volume velocity Q is generated using a simulator (10) simulating acoustic properties of at least a head of a human being, the simulator comprising a simulated human ear (14, 15) with an orifice in the simulated head and a sound source (30) for outputting the acoustical volume velocity Q through the orifice. The output volume velocity Q from the orifice of an ear is estimated from measurements with two microphones inside the corresponding ear canal.

REFERENCES:
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Applicant's admitted prior art, p. 1, line 26-p. 3, line10.
Applicant's admitted prior art, p. 1, line 26-p. 3, line 15.
Applicant's admitted prior art, p. 1, line 25-p. 3, line 15.

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