US PATENT SUBCLASS 381 / FOR 106
.~ Using frequency (381/37)

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

FOR 105  DF  SPEECH ANALYSIS AND SYNTHESIS COMBINED (381/36) {2}
FOR 106.~ Using frequency (381/37) {2}
FOR 107  DF  .~.~> Pitch (381/38)
FOR 108  DF  .~.~> Formants (381/39)

DEFINITION

Classification: 381/FOR.106

Using frequency:

Foreign art collection where the signals represent the value of a function of a component frequency.