1级和LS级, 94或114 dB@1 kHz - 型号 4231

4231型声学校准器是声级计和其他声学测试设备校准的手持式和便携式声源。它非常结实耐用...

用途

Conforms to EN/IEC 60942 (2003) Class LS and Class 1, and ANSI S1.40 – 1984
Robust, pocket-sized design with highly stable level and frequency
Calibration accuracy ± 0.2 dB
94 dB SPL, or 114 dB SPL for calibration in noisy environments
Extremely small influence of static pressure and temperature
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

Quick and easy

In five seconds you can have a definitive calibration check. There are few options – simply click a microphone into place, press the button and it is done.

There is no need to remove the protective leather case to use it, and you don’t have to spend time ensuring the fit is exact. Because of the 1000 kHz calibration frequency, there is no need to use filters for different weighting networks.

Pocket-sized

This compact unit gives you a battery-operated sound source wherever you need it.
One calibrator for all microphones
It can be used with various microphones as adaptors easily click into place. It also automatically adjusts to give the same sound pressure level for each different type of microphone you use, ensuring easy operation.
Built for years to come
Tough plastic encases the all-electronic components, which guarantee that long-term stability is not affected by external influences like barometric pressure.
Calibration is what we do
Our dedicated calibration centres around the world directly trace their own calibration to all relevant national standards. As standards often change, we always follow them closely – in fact we have a long history of helping to create them.

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