Diffusion

[Ethan Winer]

Jeff,

> Yeah...you'd think you'd have learned by now! <

ROF,L. And right back atcha.

> There's just more to a flutter echo than resonance. <

Such as?

> If one were to focus strictly on a flutter echo's dependence on wall-wall or ceiling-floor spacing, then they would appear to be quite similar. <

Yep.

> Which begins to explain the many differences, yes? <

Nope.

> It's not [different from a regular mode's repeat rate] <

Exactly my point.

So we agree that it's the very same phenomenon (resonance), but with different frequency ranges being excited, yes?

--Ethan

 

[Savant]

> There's just more to a flutter echo than resonance. <

Such as?

An echo is not a resonance. A resonance is a characteristic of a space independent of excitation. An echo demands an excitation and cannot exist without it. A flutter echo is dependent on the resonant characteristics of the space, but it not simply the same as a resonance because it's an echo. What you hear is not resonance; it's a flutter echo.

 

[Savant]

So we agree that it's the very same phenomenon (resonance), but with different frequency ranges being excited, yes?

Unfortunately, no. (I told you you'd never learn...) See my post above. If you require further explanation, I suggest we take it offline to avoid confusing people.

 

[Ethan Winer]

Jeff,

> What you hear is not resonance; it's a flutter echo. <

Okay, I guess it's just a matter of semantics. I call it resonance because the frequency depends directly on the wall-wall spacing. If I pluck a jaw harp it sounds a lot like flutter echo - they both make a "boing" sound - and I'm sure you'd call that resonance because it's based on a classic mass/spring. But I don't mind at all if you prefer to consider flutter echo to be non-resonant.

> I suggest we take it offline to avoid confusing people. <

But arguing, er, discussing, audio and acoustics with you is so much fun! And I'm sure others enjoy it too. Besides, I'm still waiting for you to reply to my last email...

--Ethan

 

[Savant]

But I don't mind at all if you prefer to consider flutter echo to be non-resonant.

I prefer no such thing. But I don't mind that you prefer to continue obnubilating.