NTi Audio – webinars on demand

Nti makes portable measurement tools as well as measurement microphones and such.

NTi Audio – website homepage

You may be able to learn some useful stuff from watching this series of video’s even if you don’t have an NTi measurement system.

NTi Audio – webinars on demand

Here is a good explanation of “frequency weighting for sound level measurements”

NTi Audio – Frequency-Weightings for Sound Level Measurements

More NTi FAQ can be found here:

NTi Audio – FAQ