![]() Hearing Loops. Hearing loop, or induction loop, systems utilize electromagnetic energy to transmit sound directly to your hearing aid or cochlear implant. ![]() They are particularly useful in courtrooms and large movie theaters. An advantage to infrared systems is the fact that their signal is unable to pass through walls as it does with FM systems, eliminating competing broadcasts that might hamper the listener and preventing confidential information from being disseminated. The transmitter converts sound signals into light and beams those to the receiver, which then translates the light signal back into sound. Infrared Systems. Infrared systems work on the same principle as FM systems, but use infrared light instead of radio waves to transmit sound.The microphone is built directly into the unit, and is often directional, allowing you to aim it in the direction of the sound source in order to pick up the signal most effectively. Personal Amplifiers. Personal amplifiers are essentially small FM systems used in smaller, more intimate settings where radio signals are less effective they are often used when watching television, traveling by car, or outdoors.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. 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. FM systems rely on radio signals to transmit amplified sounds directly to your hearing aid. Some focus on amplifying speech, while others utilize computer programs to convert text to speech. Some of the different types include: There are several different types of ALDs available, for both large facilities and personal use. ALDs are useful in a number of situations, primarily those involving distance, poor acoustics and noisy backgrounds. Some ALDs are used in conjunction with hearing aids, while others work as standalone devices. This allows the person with the hearing impairment to hear more clearly. Unlike hearing aids, which amplify sounds, ALDs work by separating speech from background noise. Assistive listening devices (ALDs) are portable systems that help individuals with hearing loss communicate more effectively.
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