Electrical audio signal processing systems and devices – Including frequency control
Patent
1993-10-28
1996-05-28
Brinich, Stephen
Electrical audio signal processing systems and devices
Including frequency control
381 94, H03G 500
Patent
active
055219837
ABSTRACT:
A speaker system for use in a high background noise environments is disclosed. The system receives an input electrical signal and produces an output sound signal predominantly within a predetermined frequency range different than the frequency range of the background noise. The system includes a bandpass filter for frequency filtering the input signal, and an audio transducer for receiving the filtered signal and producing the output sound signal. The audio transducer produces output sound signals predominantly within the predetermined frequency range.
REFERENCES:
patent: 4025721 (1977-05-01), Graupe et al.
patent: 4135590 (1979-01-01), Gaulder
patent: 4185168 (1980-01-01), Graupe et al.
patent: 4790018 (1988-12-01), Preves et al.
patent: 5067157 (1991-11-01), Ishida et al.
Greenough Glenn R.
Thompson Donald M.
Thompson, III George W.
Brinich Stephen
Vectra Corporation
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