Contacta Under the Counter Loop System

An under-counter loop system that enables clear communication with hearing instrument wearers, especially where background noise is a problem or clear speech is restricted. It has a flexible, discreet hearing loop aerial that can be bent to shape, allowing it to be tailored to many different counters.

Microprocessor control

Energy-saving “green” standby mode, achieves a power saving of up to 80% during quiet periods

Advanced audio processing features, including AGC, compression and noise gate

Constant-current loop drive

Continuous self-testing

Isolated audio line input allows the driver to take alternative audio sources (optional)

Power and LED status indication

Magnetic field range of 1200mm

Specification

Amplifier : dimensions 116 x 115 x 40mm

Amplifier : weight 0.1kg

Amplifier : construction ABS Housing

Amplifier : supply voltage 12-14Vdc

Amplifier : quiescent current 100mA typical

Amplifier : operating current 2A typical on speech peaks

Amplifier : speaker output power RMS 2.5W @ 8Ohms : 4.4W @ 4Ohms

Amplifier : loop drive compliance constant current, bounded by 4V RMS & 2 A RMS

Amplifier : total harmonic distortion <5% (loop & speakers)

Microphone : dimensions 70 x 40 x 100mm

Microphone : polar pattern Cardioid

Microphone : frequency response 70Hz - 20KHz

Microphone : sensitivity -46dBv @ 1KHz

Microphone : distortion typically less than 1%

Hearing loop aerial : dimensions 3.96m long cable

Hearing loop aerial : weight 0.1kg

Hearing loop aerial : construction copper wire with black plastic sheath

Hearing loop sign : field range 1200mm