4231声学校正器丹麦BK4231麦克风校准器

特点:
-  符合EN/IEC60942 (2003)和ANSI S1.40 – 1984 标准
-  校正精度±0.2 dB
-  94 dB SPL和114 dB SPL2种校正电平
-  1 kHz校正频率
-  适用Brüel &Kjær 1″和1/2 ″测量麦克风 (1/4"和 1/8″需要选配适配器)
FEATURES:
❍ Conbs to IEC942 (1988) Class 1ANSIS1.40–1984 (R1997)
❍ Robust pocket-size design with highly stable levelfrequency
❍ Calibration accuracy 0.2 dB
❍ 94 dB SPL,114 dB SPL for calibration in noisy environments
❍ Extremely small influence of static pressure
❍ Sound pressure independent of microphone equivalent volume
❍ 1 kHz calibration frequency for correct calibration level independent of weighting networks
❍ Fits Brüel &Kjær 1″and 1/2 ″microphones (1/4″and 1/8″microphones with adaptor)
❍ Switches off automatically when removed from the Microphone
USES:
❍ Calibration of sound level metersother sound measurement equipment