Electrical audio signal processing systems and devices – Loudspeaker feedback
Patent
1991-01-14
1993-03-23
Ng, Jin F.
Electrical audio signal processing systems and devices
Loudspeaker feedback
381 98, 381 59, 330294, 330109, H04R 300
Patent
active
051971020
ABSTRACT:
In a particular embodiment, an audio amplifier drives a load in the form of a sound producing loud speaker exhibiting a frequency variable impedance characteristic over a range of audio frequencies. Voltage and current feedback circuits respectively establish a minimum voltage feedback and a feedback characteristic representative of the load. A presence feedback circuit couples the voltage feedback circuit to ground for reducing feedback with increasing frequency above a selected level whereby the damping factor of the amplifier is reduced. A resonance feedback circuit coupled in parallel with the voltage feedback circuit reduces voltage feedback with decreasing frequencies below the selected level whereby the damping factor is accordingly reduced. The amplifier is responsive to the reduced damping factor for increasing power to the load for enhancing the sound produced by the loud speaker.
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Ng Jin F.
Peavey Electronics Corporation
Tong Nina
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