Electrical simulation of percussive bell

Details Electrical simulation of percussive bell Electrical simulation of percussive bell

1981-11-19

1984-03-13

Brigance, Gerald L.

Communications: electrical

Audible indication

Ultrasonic pest control

340384R, G08B 100

Patent

active

044370881

ABSTRACT:
An electronic circuit for simulating the sound of a percussive bell struck at a predetermined repetition rate. A realistic electronically generated sound is produced by appropriately modulating two or more audio frequencies with a decaying exponential control signal and thereafter mixing the modulated frequencies. The system comprises a repetition rate generator; a modulation envelope generator; a high and low frequency oscillator; a modulator; and a mixer together with a loud speaker. The repetition rate generator determines the ringing frequency of the simulated bell sound. The modulation envelope generator generates two decaying control signals with differing time constants with the time constant of the low frequency generator usually being greater than the time constant of the high frequency generator. Filter networks may be used to eliminate some of the harmonics. Potentiometers may be provided to vary the magnitude of the low and high frequency components at the input to the mixer. An isolation transformer may be used and connected to an external amplifier for audio distribution of the electronically generated sound.

REFERENCES:
patent: 3587094 (1971-06-01), Scott
patent: 4001816 (1977-01-01), Yamada et al.
patent: 4183278 (1980-01-01), Rea et al.
patent: 4198891 (1980-04-01), Weber
patent: 4215339 (1980-07-01), Durkee

Affiliated with

Also associated with

Rating

Electrical simulation of percussive bell does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrical simulation of percussive bell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical simulation of percussive bell will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-494667