Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate
2005-08-09
2005-08-09
Harvey, Minsun Oh (Department: 2644)
Electrical audio signal processing systems and devices
Directive circuits for microphones
C385S095000, C385S106000, C455S072000
Reexamination Certificate
active
06928170
ABSTRACT:
A wireless microphone having a split-band audio frequency companding system is disclosed. The companding system includes a compression circuit in which one amplification element is utilized in connection with a number of frequency bands. Each frequency band has a rectifier and filter element associated therewith. High-pass filter elements are utilized in the higher frequency bands of the compression and expander circuits to reduce the transfer of low-frequency signals to the rectifier elements that process the low-frequency signals, thereby reducing undesirable modulations of a variable resistance element associated therewith.
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Audio Technica, Inc.
Harvey Minsun Oh
Welsh & Katz Ltd.
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