Assistive Listening Devices (ALDS)::

Optimize use of residual hearing and hearing aid and cochlear implant technology by


 - Bypass background noise
- Overcome weakening affect of distance
- Reduce the effect of poor acoustics

Types of ALDs


- Infrared - uses light waves to transmit sound. Usually used with radio or TV, or in theaters
- FM- Uses FM (radio) signal to transmit sound to t-coil on hearing aid or cochlear implant, or to headphones
- Induction Loop - FM transmission through wire looped around seating area
- Portable
- Installed
- Often used in auditoriums or churches