Each ALS has at least three components: a microphone, a transmission technology, and a device for receiving the signal and bringing the sound to the ear. Headphones and neck loops connect to hearing aids or cochlear implants to provide the correct frequency, pitch, and volume shift in order to create the best possible speech-to-noise ratio.
Inductive, in-floor loops allow for permanent, discreet broadcast and connection. These are most helpful to users of T-coil hearing aids, delivering sound using an electromagnetic field. When combined with a lapel microphone, amplification is almost invisible.
Young students experiencing difficulty hearing a teacher often do not realize that they are the only one having the issue, or have the ability to self-advocate for a change in conditions. It becomes the responsibility of the administration and educators to either identify individuals having difficulty hearing, or to provide an environment where the teacher's voice can be heard uniformly at all points in the room. ALS allow students to receive the level of auditory input they need to succeed.