Method and device for reducing noises generated at an indoor uni

Details Method and device for reducing noises generated at an indoor uni Method and device for reducing noises generated at an indoor uni

1994-07-27

1995-10-10

Kuntz, Curtis

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

A61F 1106, H03B 2900

Patent

active

054577500

ABSTRACT:
A method of and a device for reducing noises generated at an exhaust grid of an indoor unit of separate type room air conditioner package includes speakers disposed at upper and lower sides of the exhaust grid, a sensor for sensing a noise condition at a main noise source, and a control device for analyzing the noise condition sensed by the sensor and emitting control noises through the speakers.

REFERENCES:
patent: 4506380 (1985-03-01), Matsui
patent: 4947434 (1990-08-01), Ito
patent: 5010576 (1991-04-01), Hill
patent: 5029218 (1991-07-01), Nagayasu
patent: 5097923 (1992-03-01), Ziegler et al.
patent: 5111507 (1992-05-01), Nakaji

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