Assistive Listening Devices: FM systems
FM (frequency modulation) systems are wireless systems that help people to better understand speech in noisy situations. FM systems commonly work together with a user’s hearing aids, although systems are also available for those with normal hearing. These systems are similar to those used to facilitate translating tasks and various kinds of tours.
FM technology can make a big difference in engaging the interest of a child with hearing loss and improving their achievement in school. These devices help educators combat inadequate classroom acoustics and high levels of ambient noise by providing any number of designated students with an individual audio device for hearing the teacher or other amplified audio clearly.
FM systems consist of a transmitter and microphone worn by the teacher, and a receiver used by the student. FM uses harmless radio waves to allow the child to hear the teacher’s voice as though it were close to his ears at all times, in spite of noise, the teacher’s position in the classroom, or lack of facial visibility. These systems can be useful in extracurricular activities as well, such as sports, large gatherings, at home and on long car rides.
Sound field systems can be a small speaker placed on the child’s desk or speakers mounted on classroom walls. Personal FM receivers are small die-sized devices that attach to hearing aids or cochlear implant processors.
Several companies manufacture frequency modulation systems. The video below is a demonstration of a typical FM system.
There are several companies that manufacture frequency modulation systems. The video below is a demonstration of a typical FM system. The House Research Institute does not endorse this particular product. The video is only for demonstration purposes.
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