What function does the amplifier serve in hearing aids?

The correct answer identifies the primary function of the amplifier in hearing aids, which is to amplify the intensity of sound. When sound waves enter a hearing aid, the microphone captures them and converts them into an electrical signal. The amplifier then increases the strength of this signal, making sounds louder and more easily heard by the individual. This amplification is crucial for individuals with hearing loss, as it helps them to perceive sounds in their environment more clearly and effectively.

While hearing aids may include additional features, such as noise filtering or protection against loud noises, these functions are secondary to the main role of amplification. The focus on amplifying sound intensity is essential, as it directly addresses the needs of individuals with hearing impairments, thereby improving their overall auditory experience and communication abilities.