AS ISO 389.3-2007

1 - AS ISO 389.3-2007 Acoustics - Reference zero for the calibration of audiometric equipment Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators
4 - PREFACE
5 - INTRODUCTION
7 - 1 Scope
7 - 2 Normative references
8 - 3 Definitions
9 - 4 Reference equivalent force levels (RETFLs)
9 - 5 Test conditions and requirements
9 - 5.1 Bone vibrator
9 - 5.2 Fitting of the bone vibrator
9 - 5.3 Mechanic coupler
9 - 5.4 Test signal
10 - 5.5 Masking noise
10 - 5.6 Masking transducer
10 - 5.7 Fiting of masking transducer
10 - 5.8 Datum level of masking noise
11 - Annex A (informative) Note on the derivation of RETFL values
12 - Annex B (informative) Guidance on the application of the referencezero to the calibration of bone-conduction audiometers
13 - Annex C (informative) Interim differences in reference equivalent threshold force kevels between forehead and mastoid location of vibrator
15 - Annex D (informative) Bone-conduction threshold of hearing for frequencies below 250 Hz
16 - Annex E (informative) Bibliography

AS ISO 389.3-2007 adopts and modifies ISO 389-3:1994 which specifies data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry.

First published as AS ISO 389.3-2007.