Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones (ISO 389-2:1994); German version EN ISO 389-2:1996
German title
Akustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 2: Äquivalente Bezugs-Schwellenschalldruckpegel für reine Töne und Einsteckhörer (ISO 389-2:1994); Deutsche Fassung EN ISO 389-2:1996
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