DSP-enabled amplified telephone with digital audio processing

Details DSP-enabled amplified telephone with digital audio processing DSP-enabled amplified telephone with digital audio processing

2006-05-09

2006-05-09

Chan, Wing (Department: 2643)

Telephonic communications

Including aid for handicapped user

C379S390010

Reexamination Certificate

active

07042986

ABSTRACT:
A DSP-enabled system and method for increasing intelligibility of audio on amplified telephones by providing digital audio processing customizable based on characteristics of hearing loss specific to individual end users are disclosed. The DSP-enabled amplified telephone generally comprises a DSP capable of implementing at least one digital processing mode for processing audio input, a volume control for allowing the user to select a volume control level, and a controller for interfacing between the DSP and the volume control. The DSP is optionally programmable to implement a processing mode selected from multiple processing modes that the DSP is capable of implementing. The mode is selected based upon the user's hearing loss characteristics. The DSP may be further customized by being programmed with frequency response, compression ratio, and/or knee point according to hearing loss characteristics of the user. The DSP may implement digital TILL, BILL, and/or PILL (treble, bass, and programmable increase at low levels, respectively), all of which apply more amplification to softer inputs than to louder inputs, as well as input compression, output compression, and/or finite impulse response (FIR) filter tone control.

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