多功能声校准器 - 型号  4226

4226型多功能声校准器可以对传声器，声级计和其他相关设备进行仿自由场校准

用途：

模拟自由和扩散场麦克风校准

适用½"和 ¼"麦克风验证和声学仪器符合IEC 60651和ANSI 1.4-1983标准

符合IEC 61672校验标准

参数：

标准	IEC 60942 (1998) Class 1
校准压力	94, 104 and 114 dB SPL
校准频率	31.5 Hz to 16 kHz in octave steps Hz
校准精度	± 0.2 at 94 dB dB
传感器	1/2-inch

 USES:
H Calibration and comprehensive check of 1/2″ and 1/
4″ microphone set-ups and acoustic instruments
conforming to IEC651 and ANSIS1.4-1983 such
as sound level meters, dose meters, etc.
H Checks of filter sets and other frequency-dependent
instruments

​FEATURES:
H Conforms to IEC942 1988 and ANSIS1.40–1984
H Wide frequency range: tones from 31.5Hz to 16kHz
in octave steps, plus tone at 12.5kHz
H Calibration levels of 94dB, 104 dB and 114dB
H Free-field simulation for most 1/2″ Brüel&Kjær
microphones
H Inverse A-weighting
H Recurrent pulses for time-weighting and crest factor
checks
​