Method and apparatus for adaptively pre-shaping audio signal...

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit

Reexamination Certificate

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C381S104000

Reexamination Certificate

active

10603349

ABSTRACT:
An input audio signal is analyzed to determine a power spectral density profile and the power spectral density profile is compared with at least one template profile. On the basis of the comparison, frequency bands of the input audio signal are selectively attenuated.

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