BS 2497-7:1988
$86.31
Standard reference zero for the calibration of pure tone air conduction audiometers – Specification for a standard reference zero at frequencies intermediate between those given in Parts 5 and 6 of BS 2497
| Published By | Publication Date | Number of Pages |
| BSI | 1988 | 7 |
Reference equivalent threshold sound pressure levels supplementary to those specified for earphones and couplers in Part 5 and for earphones and artificial ears in Part 6.
