4231,Sound Calibrator Class 1 and LS,94 and 114 dB, 1 kHz /I型声学校准器,94和114dB两档,1kHz;
KE-0449,Equipment Flightcase, for 4292 OmniPower Sound Source;
4189,1/2" Free-field Microphone, 6 Hz to 20 kHz, Prepolarized / 1/2"自由场传声器, 6Hz到20kHz,预极化;
ZC-0032,Microphone Pre-amplifier for Hand-held Analyzer /2250手持式分析仪用前置放大器