What is Audiometric Masking?

Audiometric Masking is performed to provide accurate results of Pure Tone Audiometry by separating the ears acoustically; this means that the non-test ear cannot assist the test ear. 

A narrow band noise is played through either supra-aural or insert headphones. The level of noise presented through the headset is calculated by the audiology clinician according to BS EN ISO 389-4 or by using Masking Noise (M) + 10. M is the lowest level of masking the client can detect and is measured in dB.