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<blockquote data-quote="dave briar" data-source="post: 140227" data-attributes="member: 7650">Re: SPL Alarm iPad/iPhone App ?Good points for sure -- but the OP&#039;s original question was expressing a need for a more ballpark answer I think.&nbsp;&nbsp; There is, however, quite an extensive calibration capability in the Audio Tools app but when I &quot;tested&quot; my devices against a proper SPL meter they were very close -- close enough for my needs.&nbsp; I originally thought the same as you regarding the mic location/position on the device and where it&#039;s pointing&nbsp; but moving it around with pink noise flooding the room shows very little change based on direction of the mic.&nbsp; In short, while there are certainly more precise/accurate measurement devices available the Audio Tools app using the built-in mic is sufficient for my needs -- and it&#039;s always in my pocket to answer those questions like:&nbsp; &quot;So just how loud is it when I&#039;m driving down the road rocking out&quot;?&nbsp; &quot;Just how loud is that lawnmower / saw / router...&quot;?&nbsp; But to your point, I would not want to testify in court without having employed the external iTestMic/iAudioInterface for the measurements.&nbsp;&nbsp; ...dave</blockquote>

[QUOTE="dave briar, post: 140227, member: 7650"] Re: SPL Alarm iPad/iPhone App ? Good points for sure -- but the OP's original question was expressing a need for a more ballpark answer I think. There is, however, quite an extensive calibration capability in the Audio Tools app but when I "tested" my devices against a proper SPL meter they were very close -- close enough for my needs. I originally thought the same as you regarding the mic location/position on the device and where it's pointing but moving it around with pink noise flooding the room shows very little change based on direction of the mic. In short, while there are certainly more precise/accurate measurement devices available the Audio Tools app using the built-in mic is sufficient for my needs -- and it's always in my pocket to answer those questions like: "So just how loud is it when I'm driving down the road rocking out"? "Just how loud is that lawnmower / saw / router..."? But to your point, I would not want to testify in court without having employed the external iTestMic/iAudioInterface for the measurements. ...dave [/QUOTE]

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