acoustic coupler

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acoustic coupler

[ə′küs·tik ′kəp·lər]
(engineering acoustics)
A device used between the modem of a computer terminal and a standard telephone line to permit transmission of digital data in either direction without making direct connections.

acoustic coupler

(hardware, communications)
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 coupler

A device that connects a terminal or computer to the handset of a telephone. It contains a shaped foam bed that the handset is placed in, and it also may contain the modem.


Acoustic Coupler
References in periodicals archive ?
Results from the experimental program include beam diffraction graphs, distance amplitude correction curves, sensitivity analysis of straight and angled beams, defect sizing analysis, and verification of the acoustic coupling phenomena.
It also has a duplex controller with signal and noise monitors on both channels to prevent the howling that can occur in hands-free telephones as a result of the acoustic coupling between the loudspeaker and the microphone.
In reality, this is not the case because of the special properties that are displayed by biological macromolecules to acoustic coupling at interfaces.
6 edition provides advanced tools to visualize acoustic coupling, create structural panels, as well as process automation for setting up NVH and Interior Acoustics models.
As Donald Miller has pointed out, an F1/H1 match is a very characteristic acoustic coupling that singers will recognize as full head or falsetto in sound, that is, as somewhat "hooty" or "whoop-like" in timbre.
The corrosion detection by AE method requires the acoustic coupling enabling the propagation of AE signals from source to a sensor mounted on a wall.
In case of a direct contact between the metal plates (variant d), the essential influence on an acoustic coupling was the surface condition and the strength of contact.
0 also provides advanced far end audio enhancements including an acoustic echo canceller to reduce acoustic coupling between the loudspeaker and the microphone.
The acoustic coupling control feature, in addition to canceling hybrid echo from the wire-line side, eliminates background noise to provide a clearer voice connection.
Hybrid cancellation and acoustic coupling control algorithms
168 specifications and the Acoustic Coupling Control feature eliminates the acoustic background noise of wireless handsets and speakerphones.