US PATENT SUBCLASS 381 / 73.1
SOUND OR NOISE MASKING

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

73.1SOUND OR NOISE MASKING

DEFINITION

Classification: 381/73.1

SOUND OR NOISE MASKING:

(under the class definition) Subject matter which utilizes sound to reduce the distractive influences of unwanted sound or other audible noise.

(1) Note. The unwanted sound may include intelligence

bearing sound (e.g., conversation).

SEE OR SEARCH CLASS

128, Surgery,

1, for pain reducing or relaxation inducing sound.

380, Cryptography,

6+, for an electrical audio signal masked for concealment by another signal.