This has the effect of direct input from the speaker or other source to the hearing aid. Background noise can still be picked up but because the speaker s voice is directly feeding into the hearing aid, the loop has the effect of reducing background noise. Permanent and Portable Loop Systems Permanently installed loop systems are ideal for frequently used lecture theatres or other public areas, including information desks. Portable systems are more appropriate for occasional use in different locations and can be set up in a matter of minutes. Microphones Most loop systems will operate conventional, radio and boundary microphones.
Radio microphones allow the speaker more freedom of movement.
Boundary microphones can be placed on the boundary of the loop, may be used in conjunction with a radio or conventional microphone and are useful when there is audience participation. The loop has a limited range of transmission and the listener may experience blank spots within and around the looped area. Individuals may try listening from various parts of the looped area until an optimum listening spot is found. A portable loop system is available on loan from the JUDE Centre. The amplifier is designed to operate into a 30 meter loop, but smaller seating areas may be looped as required.