DIN EN 60318-3:2015-09
Electroacoustics - Simulators of human head and ear - Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry (IEC 60318-3:2014); German version EN 60318-3:2015 / Note: DIN EN 60318-3 (1999-09) remains valid alongside t...