The hearing threshold is measured from sounds reaching the subject’s binaural position.

Evidence

The smallest amplitude of a tone causing an auditory event is called the hearing threshold. This threshold curve is measured as the minimum audible field (MAF), the sound pressure level of the weakest binaurally perceived sound from the front. The MAF level is measured in the free field after the subject is removed, in the position where the centre of the subject’s head was. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 977

Categorization

• DEFINE: Defines the hearing threshold and minimum audible field (MAF) calibration method.