Signal processor, method of signal processing and computer...

Details Signal processor, method of signal processing and computer... Signal processor, method of signal processing and computer...

2006-10-11

2009-08-11

Le, John H (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

C073S646000, C073S866100, C702S183000

Reexamination Certificate

active

07574326

ABSTRACT:
A CPU generates the reference value (root mean squared value) of sound level and outputs it to a DSP, the DSP generates a measured value of sound level (root mean squared value), and compares thus-generated measured value of sound level (root mean squared value) with the reference value (root mean squared value) of sound level received from the CPU, and outputs a signal expressing the result of comparison to a display device, to thereby enable comparison of the measured value of sound level (root mean squared value) with the reference value (root mean squared value) of sound level, every time the sampling takes place in synchronization with the sampling frequency in the A/D converter.

REFERENCES:
patent: 5754449 (1998-05-01), Hoshal et al.
patent: 6098463 (2000-08-01), Goldberg
patent: 6122959 (2000-09-01), Hoshal et al.
patent: 7184930 (2007-02-01), Miyasaka et al.
patent: WO 01/50098 (2001-07-01), None
patent: WO 03/044466 (2003-05-01), None
European Search Report dated Feb. 9, 2007.

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