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RTA Pro measuring road noise: should I use the C filter or the A filter?
Posts: 1
December 3, 2020 - 9:19 am


I have an audiophile friend that recommends using the C filter but in a "silent" room low frequencies are registering 50 dB or higher. I suppose that means my ear cannot hear them. And the relative change in dB once a barrier is constructed is what matters. I'm talking myself out of using the A filter as I type.

Thanks all!

Posts: 427
December 3, 2020 - 11:29 am

Use the C filter. For noise transmission data, use frequencies and amplitudes below 125 Hz.

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