The types are; In the ear canal hearing aid; and behind the
ear hearing aid. The price ranges can be from as low as
$79.00 to $2,500 per hearing aids. While some hearing
aids may look the same from the outside. Their
technologies can be completely different. Take for instance
the difference between digital and analog hearing aids. An
analog hearing aid pretty much amplifies all sounds, in an
environment. Most older hearing aids are analog and have
omnidirectional microphone. An omnidirectional
microphone amplifies sounds equally from all directions. In
contrast, a directional microphone amplifies sounds from in
front more than sounds from other directions. This means
that sounds originating from the direction the listener is
facing are amplified more than sounds from behind or in
other directions. If the speech is in front of the listener and
the noise is from a different direction, then compared to an
omnidirectional