Mastfuyi Decibel Meter, Sound Level Meter Portable, Digital SPL Meter 30-130dB with A Weighted, Fast/Slow Mode, MAX Data Hold, Clip-on Ultralight Noise Meter for Home Factory Classroom Office ...

Planning a house party over the weekend and worried about causing disturbance in your neighborhood by exceeding the sound limit? Hassled by noisy public loudspeakers or fire crackers and need to ...

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.

With a calibration DVD and sound level meter in hand, you can play a test pattern and set levels for your speakers. It also is a good idea to set all treble and bass controls to 0 as well. Set your ...