You can also use the extension microphone to listen to audio equipment that has a built-in loudspeaker without disturbing other people. Most conversation aids are designed for use with a neckloop or earloop. You can use these if you have a hearing aid with a 'T' or telecoil setting. These types of aid are less prone to background noise in loop listener mode. Loop systems are commonly installed in public places, such as meeting rooms, cinemas and banks.
Infrared systems are an excellent way of communicating at long distances.
Their main disadvantage is that you have to use the receiver and transmitter in the same room. Also, if someone stands between the infrared transmitter and receiver the sound will cut-out. On some cheaper systems, you may hear hiss as the reception is lost. This refers to the various ways in which speech can be received by a conversation aid. Sound can also be picked up directly via a lead and connector plugged into a television, video recorder or hi-fi system.