How It Works - AUDIOropa PROLOOP C Mode D'emploi

Important notes
Do not use the device:
• if the power cord or the plug are defective or damaged.
• if the device is not functioning properly or is defective.
• if the device has fallen or been damaged in any other way.
• Always make sure to pull the plug before attempting to clean
• To clean the device, simply use a soft, dry cloth – never use any
• Should a repair become necessary, have this done by an
3. Applications
The PROLOOP C amplifier was designed for use in professional venues where high reliabili-
ty and safe operation are essential. The 100 % short-circuit-proof amplifier with programma-
ble, symmetrical XLR inputs and extremely stable output power meets these requirements.
The AGC function attenuates the signal level of such constant signals as oscillation and
sine curves to - 10 dB, thus providing for consistent field strength and stable sound.
Inductive listening systems are used for different applications, e.g. for assisted listening for
the hearing impaired in churches, theaters, cinemas, waiting rooms and lounges, as inter-
preting systems, for lectures in museums, exhibitions, etc..

3.1 How it works

The induction loop amplifier generates an alternating electromagnetic field around the loop
cable. The loop consists of an insulated wire, which is usually laid singly (or doubly) along
the side of the room.
When the hearing-aid wearer set the hearing aid to the "T position", voltage is induced
into the T coil. This voltage depends on the amplifier's input signal. Now the signals are
amplified by the hearing aid and converted into sound. The alternating electromagnetic
field inside the loop allows the hearing-aid wearer to move around freely in the room and to
receive the voice or music signals as high-quality, pleasant sound.
12 English
the device.
kinds of chemicals or water.
authorized technician only.