Analog hearing aids are straightforward devices that use a microphone to obtain sound waves and transform them into electrical energy, an amplifier to increase the power of the energy, and a receiver to change the energy into acoustic sounds. They have been used for many years but usually do not offer the features of digital hearing aids.
Digital hearing aids convert the sound waves they collect into digital signals, which are processed by a computer chip in the device and converted into acoustic sound. They offer a number of features such as: