a modem designed to connect a telephone handset to a computer terminal or processor.
(computing) a device converting computer-data signals into acoustic form for transmission down a telephone line, through the handset microphone see also modem
a device used to connect a modem to a telephone line via an ordinary handset. the acoustic coupler converts electrical signals from the modem to sound via a loudspeaker, against which the mouthpiece of a telephone handset is placed. the earpiece is placed against a microphone which converts sound to electrical signals which return to the modem. the handset is inserted into a sound-proof box containing the louspeaker and microphone to avoid interference from ambient noise.
acousitic couplers are now rarely used since most modems have a direct electrical connection to the telephone line. this avoids the signal degradation caused by conversion to and from audio. direct connection is not always possible, and was actually illegal in the united kingdom before british telecom was privatised. bt’s predecessor, the general post office, did not allow subscribers to connect their own equipment to the telephone line.
- Acoustic feature
any acoustic property of a speech sound that may be recorded and -n-lyzed, as its fundamental frequency or formant structure. an acoustic property that defines a cl-ss of speech sounds, especially in distinctive feature -n-lysis, as acute, grave, or diffuse. historical examples they are not responsible for any specific sound or acoustic feature of sounds […]
acoog american college of osteopathic obstetricians and gynecologists
- Acoustic feedback
(in an audio system, especially a public-address system) the feedback of sound from a loudspeaker to a microphone, often resulting in a whistling noise caused by electrical oscillations.
- Acoustic guitar
a traditional, unamplified guitar. contemporary examples darren and him were talking and bruce had an acoustic guitar and picked it up and played the song for darren. rourke’s resurrection tom tapp october 7, 2008 george would take out his lyric book and acoustic guitar and play us the song we would be working on that […]
- Acoustic impedance
the total reaction of a medium to the transmission of sound through it, expressed as the ratio of sound pressure to particle velocity at a given point in the medium.