Induction loop systems are mainly used to help hearing impaired people obtain maximum involvement in communications.
The concept behind them is quite simple. All NHS hearing aids have a 'T' position which allows them to pick up the electromagnetic field generated by a telephone's earpiece and convert it into a sound suited to an individual's specific hearing requirements.
The PDA200E is unlike any other induction loop amplifier. Straightforward internal screw
connectors and preset controls mean no specialist audio experience or audio connectors
are required.
By following the simple set-up procedure, no further adjustments are necessary, allowing a top quality assistive listening system for a meeting room, lecture theatre, nursing home, church, school, TV lounge, GP surgery, hotel or shop to be set-up in its entirety by any competent electrician.
For ease of specification and installation, the PDA200E is available either on its own or in a variety of cost-effective kit formats (see overleaf for details).
Features
- Ideal for meeting rooms, lecture theatres, shops, churches, schools, TV lounges and other small to medium sized applications;
- Provides max. square room coverage of 120m2 (11m x 11m) or maxrectangular room coverage of 250m2 (10m x 25m);
- Straightforward internal screw connectors;
- Wall-mounting metal enclosure for permanent installation;
- Internal tamper-resistant drive, level and tone controls;
- One balanced/unbalanced microphone input;
- One balanced/unbalanced line level input (for TVs, CD players, etc);
- Alert tone switch input for doorbells, fire alarms, security.
A typical meeting/seminar room installation (using our AKM1 kit)
A loop system uses this same principle but generates a much larger field than that
created by a telephone earpiece and radiates it around a room via a 'loop'
for the benefit of any hearing impaired person(s) located within it. An induction loop
system therefore comprises four main elements:
the audio source (microphone and / or music inputs), the amplifier (specially designed
for the job), the loop (usually a single turn of wire) and the receiver(s) (hearing aids in
the 'T' position or special loop listening devices).
The size of field required can vary depending on the application, from 1m2 for ticket
booths or bank counters, to in excess of 600m2 for larger installations such as theatres
and cinemas. The PDA200E can generate a field of up to 120m2 in a square room (11m
x 11m) or 250m2 in a rectangular room (10m x 25m) and is therefore ideal for the vast
majority of small to medium sized applications.
'Outreach Plate' Input Extension System
For basic PDA200E induction loop systems, one microphone and one audio (line level) lead can be connected directly to the PDA200E's internal screw connectors.
For systems requiring more inputs, a range of wall, ceiling and desk mountable single gang audio input plates are available to increase the PDA200E's audio input capability.
A total of six 'outreach plates' are available (one to suit virtually every conceivable variant of audio input), each featuring a built-in mixer, pre-amp, input level control and balancing output. Up to ten plates of any type/mix can be daisy chained to the PDA200E with cable lengths of 100m (total network length) easily achievable using twin pair screened audio cable (i.e. Belden 8723) without any appreciable degradation of audio quality.
All plates are surface mountable on 25mm single gang back boxes and the fact they can be installed at the most convenient point on an installation overcomes the need for long trailing microphone leads and extensions. An optional 'AFILS ACTIVE' indicator plate is also available to inform the hearing impaired that a loop system has been fitted.
The outreach plate system is ideal for leisure centres, schools, conference centres, etc, where the need to have separate and spatially distributed audio inputs is a must.
For more infomation and full specification including Kit Variants, please download the PDF datasheet.