This sound frequency meter circuit is simple to build and can be constructed in a portable format. In can measure frequencies with a minimum level of 10 mVrms and a maximum frequency of up to 100kHz.

Frequency: Frequency is the range of sounds (low to high) that a sound level meter can hear. The human ear, for instance, can hear frequencies from 20 to 20,000 hertz (Hz).

Frequency! It’s an important thing to measure, which is why [Jacques Pelletier] built a frequency counter some time ago. The four-function unit is humble, capable, and also an entry into our ...

The sound level meter, however, does not take into account the predominant frequency region of the noise, or other factors which may cause annoyance. Compare: COMMUNITY NOISE EQUIVALENT LEVEL, ...