【A01】Calibration System of Laboratory Standard Microphones by Reciprocity Technique

Calibrated Device  Condenser Microphone
Range (1) 1 inch (in accordance with IEC 61094-1 LS1)
　 (1a) 1/3 Octave Band，Frequency：20 Hz to 12.5 kHz
　 (1b) 1/1 Octave Band，Frequency：31.5Hz to 8 kHz
(2) 1/2 inch (in accordance with IEC 61094-1 LS2)
　 (2a) 1/3 Octave Band，Frequency：10 Hz to 25 kHz
　 (2b) 1/1 Octave Band，Frequency：16 Hz to 16 kHz 
Uncertainty
(1) 0.06 dB(20 Hz to 40 Hz)，0.05 dB(40 Hz(excluded) to 5 kHz)，0.08 dB(5 kHz(excluded) to 10 kHz)，0.12 dB (10 kHz(excluded) to 12.5 kHz)
(2) 0.06 dB(10 Hz to 10 kHz)，0.08 dB(10 kHz(excluded) to 16 kHz)，0.12 dB(16 kHz(excluded) to 20 kHz)，0.20 dB (20 kHz(excluded) to 25 kHz)