Hearing assistive technology such as audio loops (or hearing loop), FM, and infrared systems are like binoculars for the ears and work with or without hearing aids. These are assistive listening devices that help get past the obstacles to hearing.
The audio or hearing loop is a wire that circles a room and is connected to the sound system. The loop transmits the sound magnetically. The magnetic signal is then picked up by the telecoil in the hearing aid or cochlear implant. To use a hearing loop, one easily flips the telecoil switch on the hearing aid or cochlear implant. No additional receiver or equipment is needed. Using a telecoil and hearing loop together is seamless, cost-effective, unobtrusive, and you don’t have to seek out and obtain special extra equipment.
An infrared system uses invisible light beams to carry sound from the source to a personal receiver. (The sound source must be in the line of sight.) Different types of attachments may be connected to the personal receiver such as a neckloop or a behind-the-ear silhouette inductor. The telecoil then picks up sound from the receiver via the attachment.
An FM system works similarly, but sound is conveyed though radio waves to a personal receiver.
These devices help us to hear and understand better in many situations where acoustics are poor, background noise is bothersome, and there is a long distance from the speaker.
In public places such as theaters, listening systems are required under the Americans with Disabilities Act (ADA) to make programs and services accessible. But, you must ask for the accommodation.