What is a subjective hearing test?
With the patient’s participation a subjective hearing test checks the perception of sound in the ears. Seated in a soundproofed room, various sounds in a variety of frequency domains fed into the patient’s ears via headphones. The patient indicates to the specialist the instant the sound becomes audible. This allows the ENT doctor to firstly establish any hearing loss and then concentrate on the tinnitus.
What are otoacoustic emissions?
Otoacoustic emissions (OAE) are active sound emissions, originating from the inner ear, which though often present are not perceived. OAE occur due to movements of the exterior hair sensory cells. There are two types of otoacoustic emissions to distinguish. Objective audiometry measures otoacoustic emissions, testing the functioning of the external hair sensory cells. Clinically relevant hearing disorders can be deduced from this. The OAE measurements are carried out using a small probe in the outer auditory canal.