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Overview

The NX-PDA101 is a compact induction loop amplifier for generating a loop listening field for room sizes up to 7 x 7 sqm.

The unit is designed to be mounted to a wall or shelf. The unit is mains powered, and is connected via a lead to a local plug or fused spur.

The installation comprises of an amplifier, a remote audio input socket, microphone and induction loop cable. The loop is fitted to the perimeter of the room at an approximate height of 2.4m. The microphone is a free standing desk top type to allow it to be positioned near to the user. The microphone plugs directly into audio input socket, via a 2m lead. An additional input connection is provided for connection to a local audio source, eg. TV or Music system.

What is an induction loop system?

Induction loop systems allow hearing impaired people to hear more clearly. Most hearing aids have a 'T' or 'MT' switch which allows them to pick up the electromagnetic field generated by a telephone ear-piece. This signal is converted by the hearing aid into a sound suited to its user's specific hearing requirements. An induction loop system uses this same principle but generates a much larger magnetic field than that created by a telephone ear-piece via a 'loop' of cable. Any hearing impaired person positioned within the loop can hear the loop signal by switching their hearing aid to the correct position.

System Setup

The microphone supplied is omni-directional and will pick up sounds from all around it. To help reduce background noise, it should be sited near to the person speaking and pointing in their general direction. Avoid mounting it alongside sources of unwanted noise. The microphone sensitivity is adjustable with the 'Level 1' control on the front of the amplifier.

The audio input socket panel also has an input connection for line level signals. A tape player, or VCR (audio out), or other similar source may be directly connected to this input. The audio sensitivity is adjustable with the 'Level 2' control on the front of the amplifier.

In normal use the amplifier 'limit' indicator should just flicker 'red' when speaking. The output indicator should indicate 'sig/clip' when speaking.