Acoustics Standards

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Calibrated Device  Condenser Microphone
Range (1) 1 inch (in accordance with IEC 61094-1 LS1)
  (1a) 1/3 Octave Band,Frequency:20 Hz~10 kHz
  (1b) 1/1 Octave Band,Frequency:31.5Hz~8 kHz
(2) 1/2 inch (in accordance with IEC 61094-1 LS2)
  (2a) 1/3 Octave Band,Frequency:20 Hz~25 kHz
  (2b) 1/1 Octave Band,Frequency:31.5 Hz~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(20 Hz to 40 Hz),0.05 dB(40 Hz(excluded) to 8 kHz),0.11 dB(8 kHz(excluded) to 20 kHz),0.20 dB (20 kHz(excluded) to 25 kHz)
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