This document specifies a reference threshold of hearing for the calibration of audiometric equipment
used under the following conditions.
a) The sound field in the absence of the listener consists of either a free progressive plane wave (free
field) or a diffuse sound field, as specified in ISO 8253-2. In the case of a free field, the source of
sound is directly in front of the listener (frontal incidence).
b) The sound signals are pure (sinusoidal) tones in the case of free-field conditions and one-third-octave
bands of (white or pink) noise in the case of diffuse-field conditions.
c) The sound pressure level is measured in the absence of the listener at the position where the centre
of the listener's head would be.
d) Listening is binaural.
Cross References:ISO 389-1
ISO 266
ISO 389-2
ISO 8253-1
ISO 389-8
ISO 8253-2
IEC 60645-4
IEC 60645-1
ISO 389-5
BS ISO 226:2003
All current amendments available at time of purchase are included with the purchase of this document. | File Size : | 1
file
, 1.7 MB |
| ISBN(s) : | 9780539032314 |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 20 |
| Product Code(s) : | 30388150, 30388150, 30388150 |
| Published : | 12/06/2019 |
| Same As : | BS EN ISO 389-7:2019 |
