Which component is responsible for receiving electromagnetic signals from a telephone?

The telecoil is a special component found in many hearing aids that allows them to receive electromagnetic signals directly from telephones and sound systems that are equipped with a compatible induction loop. When a user holds a phone up to their hearing aid, the telecoil picks up the electromagnetic signals transmitted from the phone, which enhances the audio quality and minimizes background noise. This feature is particularly beneficial for those who struggle with clarity in sound during phone conversations.

The other components, while important in their respective functions within a hearing aid, do not directly receive electromagnetic signals. The equalizer adjusts the balance between frequency components, the amplifier increases the power of the sound signal, and the receiver converts electrical signals into sound waves. However, none of these components have the specific function of capturing electromagnetic signals like a telecoil does.