Microphone for video surveillance

 

1680s, "ear trumpet for the hard-of-hearing," coined from Greek mikros "small" (see mica ) + phone "sound" (see fame (n.)). Modern meaning dates from 1929, from use in radio broadcasting and movie recording. Earlier, "amplifying telephone transmitter" (1878). Of the two spellings of the short form of the word, mike (1927) is older than mic (1961).

hardware, audio
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)

Microphone for video surveillance

Microphone settings allow you to select a microphone, adjust its sensitivity, and reduce the echo that may be coming from your speakers.

Adobe Flash Player automatically detects any default microphone or other audio recorder on your computer, and sets microphone sensitivity to a medium value.

Note that Flash Player asks your permission before allowing an application to access your camera or microphone. See Privacy pop-up question .

1680s, "ear trumpet for the hard-of-hearing," coined from Greek mikros "small" (see mica ) + phone "sound" (see fame (n.)). Modern meaning dates from 1929, from use in radio broadcasting and movie recording. Earlier, "amplifying telephone transmitter" (1878). Of the two spellings of the short form of the word, mike (1927) is older than mic (1961).

hardware, audio
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)