Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz

Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz

Regular price
£112.00
Sale price
£112.00
Regular price
£56.00
Sold out
Unit price
per