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.
BS 2497-7:1988
Original price was: $160.02.$80.00Current price is: $80.00.
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
BSI Group , 02/29/1988
Pages: 7
