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Junior Varsity
Measuring reverb time without any tools?
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<blockquote data-quote="Brad Weber" data-source="post: 59028" data-attributes="member: 114"><p>Re: Measuring reverb time without any tools?</p><p></p><p>Unless you are trying to meet numerical criteria that you or others have set, in which case it would seem important to have accurate numbers, then wouldn't it simply be a matter of a subjective "too live", "too dead" or "just right" judgement?</p><p></p><p>And to add to the spectral content comments, it's also the shape of the decay. A room with a decay that initially drops off quickly but then transitions to a slower decay may sound sound different from a room with the same RT60 but that initially decays slowly and then sharply drops off. That's why RT60 is limited in what it can tell you, especially since few rooms and systems can support a true reveberant field that is at least 60dB, and preferably 72dB or more, above the ambient noise at all frequencies.</p><p></p><p>FWIW, was told of a case where apparently one party measured the RT60 using calibrated instrumentation while a second party determined it by walking into the room and and having someone clap their hands a couple of times. From what I heard later, the latter was a professor with all sorts of degrees and letters after their name, none of which related to acoustics, and when it went to court that seemed to make their results perceived as being the more reliable and accurate evaluation.</p></blockquote><p></p>
[QUOTE="Brad Weber, post: 59028, member: 114"] Re: Measuring reverb time without any tools? Unless you are trying to meet numerical criteria that you or others have set, in which case it would seem important to have accurate numbers, then wouldn't it simply be a matter of a subjective "too live", "too dead" or "just right" judgement? And to add to the spectral content comments, it's also the shape of the decay. A room with a decay that initially drops off quickly but then transitions to a slower decay may sound sound different from a room with the same RT60 but that initially decays slowly and then sharply drops off. That's why RT60 is limited in what it can tell you, especially since few rooms and systems can support a true reveberant field that is at least 60dB, and preferably 72dB or more, above the ambient noise at all frequencies. FWIW, was told of a case where apparently one party measured the RT60 using calibrated instrumentation while a second party determined it by walking into the room and and having someone clap their hands a couple of times. From what I heard later, the latter was a professor with all sorts of degrees and letters after their name, none of which related to acoustics, and when it went to court that seemed to make their results perceived as being the more reliable and accurate evaluation. [/QUOTE]
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Measuring reverb time without any tools?
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