Acoustics. Reference zero for the calibration of audiometric equipment. Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones— 20 стр.
Acoustics. Reference zero for the calibration of audiometric equipment, Specification for a standard reference zero using an artificial ear complying with BS 4669— 7 стр.
Standard reference zero for the calibration of pure tone air conduction audiometers, Specification for a standard reference zero using an acoustic coupler complying with BS 4668— 8 стр.
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— 7 стр.
Standard reference zero for the calibration of pure tone air conduction audiometers, Specification for a standard reference zero using an acoustic coupler complying with BS 4668— 8 стр.
Acoustics. Reference zero for the calibration of audiometric equipment, Specification for a standard reference zero using an artificial ear complying with BS 4669— 7 стр.
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— 7 стр.
