Electrical synthesis of mechanical bell

Details Electrical synthesis of mechanical bell Electrical synthesis of mechanical bell

1981-11-19

1983-08-30

Witkowski, Stanley J.

Communications: electrical

Audible indication

Ultrasonic pest control

84 113, 84 122, 84 126, G08B 310

Patent

active

044019750

ABSTRACT:
Circuit means for synthesizing the sound of a mechanical bell by combining the three most significant frequencies of the bell to be synthesized and modulating these with a decaying exponential control signal which is derived from a clock signal having a pulse repetition rate equal to the stroke repetition rate of the bell being synthesized. The combined and modulated signal is amplified and coupled to suitable audio distribution means. Modulation of the exponential signal can provide a tremolo effect.

REFERENCES:
patent: 3971283 (1976-07-01), Wayne, Jr.
patent: 3986426 (1976-10-01), Faulhaber
patent: 4198891 (1980-04-01), Weber

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