Hearing assessment is separated into two parts. Firstly, hearing is assessed with headphones placing on both ears. Signals from low to high pitch are then presented to each ear independently. Hearing test should be performed by qualified Audiologist in a sound-proof room. Secondly, a bone vibrator is placed behind the ear to investigate the nature of hearing loss. The bone vibrator transmits signals to the inner ear, bypassing the ear canal and the middle ear. For those with conductive hearing loss, soft signals can be easily heard with the bone vibrator. For those with sensorineural hearing loss, signals are heard at similar levels with both devices.