What is a subjective hearing test?
A subjective hearing test checks the patient’s perception of sound in the ears. While in a soundproof room, the patient listens to different sounds in a variety of frequencies 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 to try to determine if the ear ringing is related to the hearing loss.
What are otoacoustic emissions?
Otoacoustic emissions (OAE) are active sound emissions, originating from the inner ear, which are often present, but not perceived. OAE occur due to movements of the exterior hair sensory cells. The OAE measurements are carried out using a small probe in the outer auditory canal. There are two types of otoacoustic emissions to distinguish. Objective audiometry measures the sound emissions, testing the functioning of the external hair sensory cells. Clinically relevant hearing disorders can be deduced from this.