Electro acoustic system built-in test and calibration method

Details Electro acoustic system built-in test and calibration method Electro acoustic system built-in test and calibration method

2005-01-06

2009-10-13

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

C381S096000, C381S108000, C381S058000, C702S103000

Reexamination Certificate

active

07602923

ABSTRACT:
An electro acoustic system built-in test and calibration method utilizes a built-in self-test module to send a test signal through a first circuit device to an audio transmitter, causing the audio transmitter to output a test signal, for enabling the test signal to be received by a audio receiver and then processed by a connected circuit device and converted into a feedback digital signal to the self-test module for comparing the linearity relative to the originally provided test signal so that the parameter values and conformity of circuit devices can be optimized subject to comparison result. The test and adjustment procedure is recycled for other parameter items, and a warning signal is produced when proper adjustment cannot be done. This built-in test and calibration module can be achieved in the form of an independent firmware code module, using the same DSP (digital signal processor) engine that drives the system for the self test purpose, in so doing, the function of self test can be called along the production line, in use, throughout the service life of the product, and virtually without any additional cost.

REFERENCES:
patent: 4395588 (1983-07-01), Franssen et al.
patent: 5771297 (1998-06-01), Richardson
patent: 6704424 (2004-03-01), Killion
patent: 6795557 (2004-09-01), Makivirta et al.
patent: 7054448 (2006-05-01), Yoshino et al.

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