Acoustic transfer function simulating method and simulator using

Details Acoustic transfer function simulating method and simulator using Acoustic transfer function simulating method and simulator using

1992-03-20

1993-02-16

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

367901, 364574, G01S 1500, G01K 1500

Patent

active

051876922

ABSTRACT:
A plurality of acoustic transfer functions for a plurality of sets of different positions of a loudspeaker and a microphone in an acoustic system are measured by an acoustic transfer function measuring part. The plurality of measured acoustic transfer functions are used to estimate poles of the acoustic system by a pole estimation part, and a fixed AR filter is provided with the estimated poles as fixed values. A variable MA filter is connected in series to the fixed AR filter and the acoustic transfer function of the acoustic system is simulated by the two filters. The filter coefficients of the variable MA filter are modified with a change in the acoustic transfer function of the acoustic system.

REFERENCES:
patent: 4600815 (1986-07-01), Horna
patent: 4683590 (1987-07-01), Miyoshi et al.
patent: 4747132 (1988-05-01), Ibaraki et al.
"Inverse Filtering of Room Acoustics" by M. Miyoshi et al IEEE Trans. on Acoustics, Speech & Signal Proc., vol. 36, No. 2, Feb. '88, pp. 145-152.

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