Highly rated hearing aids include behind-the-ear aids that send sounds to the ear through a small soft tip known as an open fitting. In-the-ear aids, in-the-canal aids and completely in-the-canal aids are also highly rated, as stated by NHS Choices.
Hearing aids work by making sounds louder so that individuals can hear them better. Their small microphones collect the sound from environment, and a computer chip converts the sound into a digital code. It also analyzes and makes adjustments to the sound according to the individual's hearing loss, as stated by Mayo Clinic.
Hearing aids have additional features to enhance hearing, including directional microphones, telephone adapters or telecoils, wireless connectivity, remote controls and direct audio input as well as variable programming and synchronization, according to Mayo Clinic.