Absolutely, certainly on say an iPhone or equivalent Samsung produced in the last 5 years of so, or similar quality, the microphones are surprisingly good, certainly above 100hz, and from the few test measurements done give a reasonably flat response up to around 12Khz. They certainly are not up to the level of Brüel & Kjær decibel meter which is for lab measurements and costs thousands, but they will be accurate to with 025dB, they are probably as good if not better than a £15 to £30 dedicated dB better purchased off of Amazon. Remember what we want to establish is the relative decibel level of one channel to another using a single frequency, so how accurate it reports the level in relation to an extremely accurate piece of kit is not so important. As long as the software and hardware produce a stable result of measured level then it should be good enough.Originally Posted by Barry
A modern mobile device is an extremely powerful processing tool, basically getting its accuracy from sampling and as they can sample very quickly and in many times can achieve a good level of accuracy especially when measuring a single frequency such as 300hz, even doing spectrum analysis from 20hz to 20khz they are reasonably good I believe, although the accuracy will be dependent on the microphones frequency
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