Assistive listening devices (ALDs) are portable systems that help individuals with hearing loss communicate more effectively. Unlike hearing aids, which amplify sounds, ALDs work by separating speech from background noise. This allows the person with the hearing impairment to hear more clearly.
Some ALDs are used in conjunction with hearing aids, while others work as standalone devices. ALDs are useful in a number of situations, primarily those involving distance, poor acoustics and noisy backgrounds.
What Types of Assistive Listening Devices Are Available?
There are several different types of ALDs available, for both large facilities and personal use. Some focus on amplifying speech, while others utilize computer programs to convert text to speech. Some of the different types include:
FM systems rely on radio signals to transmit amplified sounds directly to your hearing aid. They consist of a microphone, transmitter and receiver, and are used in a variety of public places such as classrooms, restaurants, movie theaters and churches.
The microphone is worn by the person speaking (or placed in close proximity to the sound source) and the signal is broadcast from the transmitter to the receiver, which is tuned to a specific frequency.
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