Assistive listening devices audio induction loops system amplifiers

ASSISTIVE LISTENING SYSTEMS

AMPETRONIC INDUCTION LOOP DRIVER SELECTION GUIDELINES

Assistive listening systems begin with the induction loop amplifier. This table lists many common applications, and gives a quick view of which AMPETRONIC induction loop amplifier may be suitable for a given application. If you have any questions, or require a specialize application, please contact us.

Areas under 20m² (215 sq. ft.) Reception Desks Service Windows Service Counters Confessional Environments	ILD20 Choice of microphones Custom coils are available for specialized applications.
Areas under 60m² (650 sq. ft.) Hotel/Motel Rooms Nursing Home TV/Music Rooms Home Theater Rooms Control Room Linking	ILD60 Choice of microphones Unit is equipped with an input for direct connection to a audio source
Confidential / Low-Spillover Systems Conference / Teleconference Rooms Lecture Halls, Classrooms Cinemas Courts Council Chambers	ILD122 (< 120m² ) ILD252 (< 250m² ) ILD9 (< 500m²) Used with phase shifters or multiple amplifier/driver designs Low-spillover loop arrays are installation specific
General Purpose Applications Churches Public Buildings Visitor Guidance Museum Commentary	ILD122, ILD252, ILD9 These units are Master/slave configurable and can provide coverage for very large areas
Automobiles, Tour Buses, Motor Homes, Yachts, Boats	ILD20DC, ILD60DC, ILD122DC Designed to operate on 12V DC current
Drive-thru Station Applications Fast Food Order Stations and Pick-up Windows Bank Drive-thru Tellers Pharmacy Pick-up Drive-thru	These are specially modified ILD20 units. Please contact us for details Allow the Hard of Hearing to remain seated inside their vehicle and communicate with intelligibility and without a receiver or headset Installation is invisible and vandal proof
Metal Enclosures / Priority Public Service Announcements Elevators Airports, train stations, public areas	ILD15BB Voice alarm / Emergency notification applications Battery backup ensures constant power supply
Customized Layouts Theaters with Loges Concert Halls Cathedrals Very Irregularly Shaped Rooms Very Large Area Systems	Advisory & Consulting Services An advanced CAD program, developed and written in house, permits full analysis of the entire spatial magnetic field generated by the loop Support ranges from free loop installation advice to extensive design work and site visits which are chargeable activities

Apart from the specialized applications as listed in the table, and which are marked on the individual data sheets, there are general rules to assist in selecting the appropriate model.

If there is metal in the building's construction, or this is suspected, extra current is usually needed to overcome the losses caused by metal. The extra current needed is typically 3dB to 12dB more than the no-loss current. Site measurement is always needed in such cases. Always consult with us if metal loss or metal is suspected.

When dealing with loops that are displaced from the listening level by more than 25% of the width of the area to be looped, consult us as this normally requires more current, and driver selection can be influenced by the use of current ratio units.

Induction Loop Drivers	Products & Services	Contact AssistiveAudio

Copyright © 1999 AssistiveAudio. All rights reserved.
Information in this document is subject to change without notice.
Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders.