Circuit for improving the intelligibility of audio signals...

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Reexamination Certificate

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C704S200000, C704S270000

Reexamination Certificate

active

07418379

ABSTRACT:
The speech intelligibility of an audio signal of unchanged volume is improved by raising the total audio signal by a constant factor and lowering the amplitude of this raised signal by a high-pass filter. The corner frequency fcof the high-pass filter is adjusted such that the output amplitude of the audio signal at the end of the processing segment is equal or proportional to the input amplitude of the audio signal.

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Kretsinger, Elwood et. al: “The Use of Fast Limiting to Improve the Intelligibility of Speech in Noise,” Speech Monographs, Mar. 1960.
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