.~> Amplification control responsive to ambient sound
DEFINITION
Classification: 381/56
MONITORING OF SOUND:
(under the class definition) Subject matter having a qualitative (yes-no) indication dependent upon a parameter of sound waves, e.g., loudness, quality, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
58+, for monitoring the operation of audio devices.
77+, for systems having a microphone at a location remote from a listening location (i.e., one-way intercoms).
SEE OR SEARCH CLASS
73, Measuring and Testing,
570+, for measuring and testing sound waves where a quantative (numerical) indication is given, especially 645+ for measuring an acoustic parameter. 367, Communications, Electrical: Acoustic Wave Systems and Devices,
