Electrical audio signal processing systems and devices – Feedback suppression
Patent
1996-02-12
1999-07-06
Chang, Vivian
Electrical audio signal processing systems and devices
Feedback suppression
381 83, H04B 1500
Patent
active
059206330
ABSTRACT:
An acoustic transmission line speaker enclosure with concentric cylindrical structures establishes acoustic coupling between a rear-traveling sound wave and a surrounding air mass. Inherent rigidity or high bending resistance of the cylindrical structure allows use of very thin walled cylinders without a massive and large overall enclosure. An audio amplifier tunable to a listening room removes very low narrow frequency band components of an audio signal. Listening room cavity resonance is measured by injecting a frequency-varying sound wave into the listening room while detecting peak sound energy within the room. The filter the eliminates from audio signal frequencies associated with listening room cavity resonance.
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Chang Vivian
Cushing Keith A.
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