Acoustic feedback peak elimination unit

Details Acoustic feedback peak elimination unit Acoustic feedback peak elimination unit

1976-12-29

1977-12-20

Mullins, James B.

Amplifiers

With amplifier condition indicating or testing means

179 1FS, 179 1P, 330109, 330126, 330151, 331 59, H03F 134

Patent

active

040644626

ABSTRACT:
This invention is an acoustic feedback peak elimination unit and has as its objective the elimination of unwanted acoustic resonance peaks, also called ring modes, inherent in an enclosed region where a sound amplifying system may be used. A number of separate units embodying the present invention may be used in cascade, each unit being adapted to handle a small frequency range of about an octave within the entire frequency range to be amplified, each such unit functioning at unity gain to eliminate a single feedback peak when present. In addition, the invention includes means for energizing an oscillator within its tunable frequency range so that a particular frequency may be introduced for tuning the entire sound system with desired precision.

REFERENCES:
patent: 3530394 (1970-09-01), Deloach
patent: 3750044 (1973-07-01), Stanley
patent: 3755749 (1973-08-01), Van Ryswyk et al.
patent: 3818149 (1974-06-01), Stearns et al.
patent: 4001732 (1977-01-01), Gundry
"Controlled Active RC Filter Circuitry gives Lab. Unit Wide Applications," Electronic Design 3, Feb. 1, 1967, pp. 110,112.

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