Turn your iPhone or iPad into a Professional Noise Meter with this Calibrated Microphone for iPhone and iPad, and our Noisoff App ! (also valid for Android devices)
It appears to be a traffic signal, but actually signals too much noise. Select the appropriate sound level for any given situation and let our Noise Controller be an audio-visual reminder when the noise level gets too high.
This practical Sound Level Meter unit was designed according to following standards: A. International electrician committee standard: IEC PUB 651 TYPE2 B. US national standard: ANSI S1.4 TYPE2