US PATENT SUBCLASS 381 / 313
.~ Directional


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

312  DF  HEARING AIDS, ELECTRICAL {9}
313.~ Directional


DEFINITION

Classification: 381/313

Directional:

(under subclass 312) Subject matter where a response of an input transducer (i.e., microphone) to the ambient sound varies significantly with a location of a source relative to the transducer, the hearing aid, or the hearing aid user.

SEE OR SEARCH THIS CLASS, SUBCLASS:

356+, for a directional microphone.