Re: Acoustic impedance

[Brian Whatcott <inet@INTELLISYS.NET>]

At 12:23 AM 2/7/02, you wrote:
> Me thinks the clue as to whether a tube is closed or not is the phase change
> upon reflection.  With this in mind, which is it?
>
> Tanks,
>
> bc


I'd say that higher frequencies are adequately coupled to the free space
impedance by the transition section (horn) being a sizable part of a
wavelength - and the lower frequencies are reflected in phase. (This is
solely by analogy with transmission lines which use comparable rules.)


Brian Whatcott
  Altus OK                      Eureka!