AS/NZS ISO 389.3 PDF

AS/NZS ISO 389.3 – Acoustics – Reference zero for the calibration of audiometric equipment, Part 3: Reference equivalent threshold vibratory force levels for pure tones and bone vibrators

The objective of this Standard is to specify the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry: (a) reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry; (b) essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler; and (c) essential characteristics of the masking noise and the baseline masking noise level applied to the ear not under test.