Phonetic equalizer system
December 17, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and means for adaptively filtering near-stationary noise from an information bearing signal Hearing aid amplifier Apparatus for multichannel cochlear implant hearing aid system Programmable signal processing device Equalizer networks and methods of developing scaling coefficients therefor Electronic audio signal processor Stereo generator Programmable digital hearing aid system Equalizer with adjustable band filters and a digital filter suitable for use in the equalizer Hearing aid signal-processing system InventorsAssigneeApplicationNo. 808685 filed on 12/17/1991US Classes:381/97, INCLUDING PHASE CONTROL381/17, Pseudo stereophonic381/98, INCLUDING FREQUENCY CONTROL381/320Spectral controlExaminersPrimary: Isen, Forester W.Attorney, Agent or FirmForeign Patent References
International ClassH03G 005/00AbstractAn audio equalizer system includes a filter having a passband extending substantially continuously across the audio spectrum, with the filter having an input terminal and an output terminal. An input network is adapted to apply an input audio signal to the input terminal of the filter, and an output network is adapted to provide an output audio signal representative of the signal at the output terminal of the filter. The group delay of the filter varies continuously with frequency across the audio spectrum, with that group delay being relatively high but less than approximately 10 milliseconds at frequencies less than approximately 200 Hz and being relatively low but greater than or equal to zero at frequencies greater than approximately 8000 Hz. When configured as a hearing assistance system, an input audio transducer, or microphone, generates the audio input signal from an incident acoustic wave, and an output audio transducer, or speaker, produces an output acoustic wave from the output audio signal.Other References
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