Device for noise attenuation of weaving machine

Details Device for noise attenuation of weaving machine Device for noise attenuation of weaving machine

1992-03-09

1993-12-14

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

G10K 1116

Patent

active

052710629

ABSTRACT:
A device for noise attenuation attenuates the noises generated from weaving machines and comprises first conversion means for receiving a sound and outputting an electrical acoustic signal corresponding to the sound, first signal processing means for receiving the acousto-electric signal and outputting a first electrical signal having the frequency and amplitude corresponding to a sound to be attenuated on the basis of the received acoustic-electric signal, second signal processing means for receiving the first electrical signal and outputting a second electrical signal having the same frequency and inverted phase relative to the first electrical signal, and second conversion means for receiving the second electrical signal and generating a sound corresponding to the received second electrical signal.

REFERENCES:
patent: 4506380 (1985-03-01), Matsui
patent: 4689821 (1987-08-01), Salikuddin et al.
patent: 4862506 (1989-08-01), Landgarten et al.
patent: 4947435 (1990-08-01), Taylor
patent: 5111507 (1992-05-01), Nakaji

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