出典:Wikipedia
出典:『Wikipedia』 (2011/06/21 18:00 UTC 版)
A wireless microphone, as the name implies, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated.
![]()
a loudspeaker that does not produce a magnetic field
a microphone used to record sound waves under water, called hydrophone
a loudspeaker used for projecting out sound
a telephone with a microphone and loudspeaker