Assistive listening devices
Assistive Listening Devices (pronunciation: uh-sis-tiv lis-ning di-vahys, etymology: Assistive from the Latin assistere meaning 'to stand by', Listening from the Old English hlysnan meaning 'to listen', and Devices from the Latin divisus meaning 'to divide or distribute') are tools designed to improve the hearing ability of individuals with hearing impairments. They can be used with or without Hearing aids or Cochlear implants.
Overview
Assistive Listening Devices (ALDs) help to amplify the sounds you want to hear, especially where there’s a lot of background noise. ALDs can be used with a hearing aid or cochlear implant to help a wearer hear certain sounds better.
Types of Assistive Listening Devices
There are several types of Assistive Listening Devices, including:
- Personal Amplifiers: These are useful in places where the above systems are unavailable or when watching TV, being outdoors, or traveling in a car.
- FM Systems': These are often used in classrooms, where the instructor wears a small microphone connected to a transmitter and the student wears the receiver, which is tuned to a specific frequency, or channel.
- Infrared Systems: These are often used in theaters or places of worship, where the sound is sent by infrared light waves to the receiver worn by the listener.
- Induction Loop Systems: These are often used in auditoriums, concert halls, and places of worship, where the loop system provides a magnetic field that can be picked up by hearing aids and cochlear implants.
See Also
External links
- Medical encyclopedia article on Assistive listening devices
- Wikipedia's article - Assistive listening devices
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