资料来源 : pyDict
扩音器,麦克风
资料来源 : Webster's Revised Unabridged Dictionary (1913)
Microphone \Mi"cro*phone\, n. [Micro- + Gr. ? sound, voice: cf.
F. microphone.] (Physics)
An instrument for intensifying and making audible very feeble
sounds. It produces its effects by the changes of intensity
in an electric current, occasioned by the variations in the
contact resistance of conducting bodies, especially of
imperfect conductors, under the action of acoustic
vibrations.
资料来源 : WordNet®
microphone
n : device for converting sound waves into electrical energy
[syn: {mike}]
资料来源 : Free On-Line Dictionary of Computing
microphone
Any electromechanical device designed to
convert sound into an electrical signal.
A microphone converts an acoustic waveform consisting of
alternating high and low air pressure travelling through the
air into a voltage. To do this it uses some kind of pressure
or movement sensor. The simplest kind of microphone is
actually very similar in construction to a {loudspeaker}.
The analogue electrical signal can be fed into a computer's
{sound card} where it is amplified and {sampled} to convert it
into a {digital} waveform for storage or transmission.
(2002-11-04)