They are often used in educational settings and offer mobility and flexibility when used with portable body-worn transmitters. Each one has advantages and disadvantages.įM systems are ALSs that use radio broadcast technology. All three technologies are considered good. People use ALSs in places of entertainment, employment, and education, as well as for home/personal use.ĪLSs utilize FM, infrared, or inductive loop technologies. ALDs are sometimes described as “binoculars for the ears” because they “stretch” hearing aids and cochlear implants, thus extending their reach and increasing their effectiveness.ĪLSs help address listening challenges in three ways: minimizing background noise reducing the effect of distance between the sound source and the deaf or hard of hearing person and overriding poor acoustics such as echo. Hearing aids or cochlear implants have performance limitations and do not work well in all situations. This includes hearing aid users and cochlear implant users, as well as consumers who do not use either hearing aids or cochlear implants. ALSs are used by people with all degrees of hearing loss, from mild to profound. An ALS allows them to achieve this gain for themselves without making it too loud for everyone else.Ĭan ALSs Be Used By Some People Who Are Deaf? Research indicates that people who are hard of hearing require a volume (signal to noise ratio) increase of about 15 to 25 dB in order to achieve the same level of understanding as people with normal hearing. They improve what is known as the “speech to noise ratio.” They separate the sounds, particularly speech, that a person wants to hear from background noise. Essentially they are amplifiers that bring sound directly into the ear. This article is written from the perspective that Assistive Listening Systems (ALSs) can benefit many hearing aid and cochlear implant users.Īssistive Listening Systems (ALSs) are sometimes called Assistive Listening Devices (ALDs). The implications of this fact are often overlooked for a variety of reasons that include a lack of understanding about modern technology that improves access to sound. People show varying degrees of hearing at varying frequencies in both ears. Hearing is not an all or nothing phenomenon.
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