What is an Induction Loop?
Most hearing aid users are aware of the existence of induction loops as these devices have been present in many public buildings for some years and they will be familiar with the process of switching their hearing aid to the “T” position.
An induction loop system consists of an amplifier and a loop of wire connected to a sound source, usually the building’s main PA system or simply a microphone.
The loop can consist of one turn of insulated wire placed around the perimeter of the room or, in some cases, an array of loops placed across the floor.
When the alternating current from the amplifier flows through the loop a magnetic field is created within the room and fluctuations in the magnetic field are induced into the hearing aid telecoil; these are in turn amplified and converted by the hearing aid into sound.
Why an Induction Loop?
In a noisy environment or one in which reverberations and echoes are noticeable it can be more difficult for anyone to understand what is said, but for a person with impaired hearing using a hearing aid it can be almost impossible.
When an induction loop is operating the hearing aid user receives sound that is not affected by their distance from the sound source and therefore, many unwanted aspects of the room acoustic or background noises are less likely to distort the sound.
With a correctly installed and configured induction loop the hearing aid user can expect to receive clear undistorted sound.