Network audio processor

H - Electricity – 03 – G

Patent

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Details

H03G 3/32 (2006.01) H04R 27/00 (2006.01)

Patent

CA 2696507

An audio circuit and associated method for enhanced intelligibility of audio content includes a first means for receiving reproduced audio content, a microphone for providing a microphone output signal in accordance with ambient noise, a second means for enabling the microphone output signal when the reproduced audio content is off, and disabling the microphone output signal when the reproduced audio content is on, and a signal processor, in communication with the first and second means. The signal processor applies a transfer function to the reproduced audio content for increasing gain to the reproduced audio content as a function of increasing amplitude of the microphone output signal, and decreasing gain to the reproduced audio content signal as a function of decreasing amplitude of the microphone output signal, and applies an equalization curve to the audio content to boost frequencies in a range that enhances consonant perception thus increasing speech intelligibility.

Un circuit audio et un procédé associé permettant une meilleure intelligibilité d'un contenu audio comprennent des premiers moyens adaptés pour recevoir un contenu audio reproduit, un microphone adapté pour émettre un signal de sortie de microphone en fonction d'un bruit ambiant, des seconds moyens permettant d'activer le signal de sortie de microphone quand le contenu audio reproduit est inactif et de désactiver le signal de sortie de microphone quand le contenu audio reproduit est actif, ainsi qu'un processeur de signal en communication avec les premiers et seconds moyens. Le processeur de signal applique une fonction de transfert au contenu audio reproduit afin d'augmenter le gain du contenu audio reproduit en fonction de l'augmentation de l'amplitude du signal de sortie de microphone et de diminuer le gain du contenu audio reproduit en fonction de la diminution de l'amplitude du signal de sortie de microphone, puis applique une courbe d'égalisation au contenu audio de façon à augmenter les fréquences jusque dans une plage qui améliore la perception des consonnes et, par conséquent, l'intelligibilité du discours.

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