How hearing aids work is that they have 4 basic components that confer their functions:

• The microphone picks up the sounds in the environment and passes them to the processor.
• The processor enhances the signal and delivers it to the receiver
• The receiver delivers the amplified sound to the ear canal.
• The power source refers to the battery, which drives the hearing aids system.

With the advancement in hearing aid technology, these basic parts have transformed into 4 sophisticated components. The sound picked up by the microphone can now be converted from analog to digital before processing, then converted back from digital to analog by the processor before the receiver delivers the enhanced sound into the ear canal.

This technology has driven digital hearing aids to perform multiple sound processing and management tasks simultaneously and more efficiently. As with all other electronic devices, the battery is the main power source driving the hearing aids system.