What are examples of ALDs?

Induction Loop:

Used in churches, arenas, classrooms, home theaters, etc.

This is a large-area telecoil
loop system used in large
venues and even in the home.
Position yourself anywhere
within the "looped" listening
area and use the built-in telecoil
on your audio processor.

Transmitter/Receiver:

Used in churches, arenas, classrooms, home theaters, etc.

An audio source is transmitted to a receiver via infrared signals, radio frequency, etc. Depending on the system, you will either need to use headphones, a telecoil accessory (such as a neckloop or silhouette), an audio cable, or a wireless ear-level receiver.

This setup is commonly applies to FM systems, which are useful in a variety of situations such as a classroom lecture, in a restaurant or a sales meeting.

Larger FM systems are often
used in theaters, places of
worship, museums, public
meeting places, corporate conference rooms and
convention centers.

Personal Audio Device:

MP3 players, portable game systems, digital eBooks, etc.

Several options are available
to connect devices like an iPod
or portable game system.
A telecoil accessory or audio
cable can be directly connected
to the audio device, or a wireless connection can be used with
an ear-level receiver.

Phone:

Using the built-in telecoil feature.

A telecoil accessory
with a built-in microphone
works well with most phones.
You can also use the
built-in telecoil on your
processor directly with a 
telecoil-compatible phone.

Bluetooth Device:

Using with phones or BlueTooth-enabled entertainment devices.

Bluetooth is a low-power, short range technology that wirelessly connects cell phones (or MP3 devices, PDAs, computers, etc.) to a compatible receiver. Some receivers can be connected directly to the audio processor and others are used with a headset or telecoil accessory.

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