SOUND CALIBRATOR 94DB,114DB
* Useful tool to calibrate the
Sound Level meter precisely.
* Frequency : 1000 Hz ± 5 %.
* Sound Pressure Level :
94 dB and 114 dB.
* Suitable Microphone Type :
0.5 inch or 1 inch microphone.
* Power : 2 PCs 006P DC 9V batteres.