How to determine or calculate the noise level treatment that required in duct fan system in air conditioning?

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Yehia F. Khalil

There are free APPS that you can download for free on your mobile phone to measure the noise levels (in dB). For example, you could use the "Sound Level Meter" APP.

Hope this helps answer your question.

Professor Yehia Khalil

Yale University

USA

D.B. Jani

Thanks for your help and support