Historical
ANSI/ASA S3.25-2009 (R2019)
Occluded Ear Simulator
The acoustical performance of an occluded ear simulator is specified. This device is designed to simulate the acoustical behavior of the ear canal between the tip of an ear mold and the eardrum, including the acoustic impedance at the eardrum of a median adult human ear.
Acoustical Society of America [asa]