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<blockquote data-quote="Brad Weber" data-source="post: 30783" data-attributes="member: 114"><p>Re: Accoustic Measurments</p><p></p><p></p><p>And related to this, could it have localized conditions that vary? That may be compounded by using directional sources</p><p></p><p>I think a lot of people get false results from devices that give simple single number RT measurements. The 'old days' of using strip chart recorders and calculating the RT times involved from the resulting traces involved more work but also forced you to look at the actual trace and understand what you were using as the basis of the RT numbers. Some modern measurement platforms let you do that with greater ease and accuracy but others try to do the work for you automatically and in some cases without knowing how the calculation is made. The result is a nice simple number, that may or may not be valid.</p><p></p><p>FWIW, true RT60 numbers are a challenge to get in many venues as getting a 60dB+ S/N ratio at all frequencies can be difficult.</p></blockquote><p></p>
[QUOTE="Brad Weber, post: 30783, member: 114"] Re: Accoustic Measurments And related to this, could it have localized conditions that vary? That may be compounded by using directional sources I think a lot of people get false results from devices that give simple single number RT measurements. The 'old days' of using strip chart recorders and calculating the RT times involved from the resulting traces involved more work but also forced you to look at the actual trace and understand what you were using as the basis of the RT numbers. Some modern measurement platforms let you do that with greater ease and accuracy but others try to do the work for you automatically and in some cases without knowing how the calculation is made. The result is a nice simple number, that may or may not be valid. FWIW, true RT60 numbers are a challenge to get in many venues as getting a 60dB+ S/N ratio at all frequencies can be difficult. [/QUOTE]
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