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Audio and Video Talk
General Discussion
The validity of audio measurement
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<blockquote data-quote="Vaughan" data-source="post: 35371" data-attributes="member: 693"><p>In my opinion, I wouldn't say some rooms but rather in <em>most</em> rooms a bass note would take a finite time to build up or resonate unless you are in a stadium. If the fundamental resonance (and it's subsequent harmonics) co-aligns with the AC signal then frequencies will build up and decay at non-uniform rates. </p><p></p><p>Of course, you don't need a natural room resonance for this to happen either but the order of damage it causes from a frequency amplitude/time decay perspective is greater than non-modal resonances. When a frequency reflects back onto it's own axis with each subsequent cycle the energy will be ramped up causing it to decay slower or longer than if that resonance wasn't there to begin with. That's probably an oversimplification, but anyways.</p><p></p><p>Some call that "modal ringing", others have different names for the decay irregularities.</p><p></p><p>Regards,</p></blockquote><p></p>
[QUOTE="Vaughan, post: 35371, member: 693"] In my opinion, I wouldn't say some rooms but rather in [i]most[/i] rooms a bass note would take a finite time to build up or resonate unless you are in a stadium. If the fundamental resonance (and it's subsequent harmonics) co-aligns with the AC signal then frequencies will build up and decay at non-uniform rates. Of course, you don't need a natural room resonance for this to happen either but the order of damage it causes from a frequency amplitude/time decay perspective is greater than non-modal resonances. When a frequency reflects back onto it's own axis with each subsequent cycle the energy will be ramped up causing it to decay slower or longer than if that resonance wasn't there to begin with. That's probably an oversimplification, but anyways. Some call that "modal ringing", others have different names for the decay irregularities. Regards, [/QUOTE]
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Audio and Video Talk
General Discussion
The validity of audio measurement
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