is this a horn or a waveguide?

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#141
doug20 said:
Of course ALL waveguides are horns and why does anyone argue or care if waveguide is simply a better term for a horn these days?? Yes, the word "horn" is nasty, its up there with the word "audiophile" 😉 Horns have controlled directivity so the discussion around waveguides being special at that is silly, just look at the incredible designs Danley has to figure that one out.
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I guess I thought of it the other way: that horns are a subset of waveguides.

I certainly think that both acoustical and electrical waveguides are worthy of the term if they define a bounded path for wavefronts to follow. We could even consider other objects as waveguides. The contours of the ocean floor and their impact on water waves? If I have a hallway full of people and impart wave motion (press on the backs of people at one end of the hall) it is a waveguide, is it not? And a freeway full of cars is a waveguide. Compressions and rarefactions move along its length. It even exhibits stationary phenomina while having medium flow. (beware the higher order modes! people driving sideways!)

David S.
 
#142
speaker dave said:
I guess I thought of it the other way: that horns are a subset of waveguides.

I certainly think that both acoustical and electrical waveguides are worthy of the term if they define a bounded path for wavefronts to follow. We could even consider other objects as waveguides. The contours of the ocean floor and their impact on water waves? If I have a hallway full of people and impart wave motion (press on the backs of people at one end of the hall) it is a waveguide, is it not? And a freeway full of cars is a waveguide. Compressions and rarefactions move along its length. It even exhibits stationary phenomina while having medium flow. (beware the higher order modes! people driving sideways!)

David S.
Click to expand...

No arguements at all. Of course I think that on an audio forum, in a diy speaker subforum the discussion should be only about sound waves. referencing electrical waves, microwaves, etc is a step out of bounds on the real question here. Fluid dynamics (traffic flow, etc) ....is way out there. My posts is 100% about audio....I know all about other "waveguides" but I think its just sily to be pedantic about the definition alone ignoring the reference point. When someone asks in an audio forum "is this a horn or a waveguide"? Do people really go down the rabbit hole that far just to prove some obscure point?

So back to the real important audio science question....Meaning lets only focus on soundwaves and on speaker design. What waveguide is not a horn??

So far in the world of audio. All Waveguides are horns...but Im waiting for the exception.
 
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#143
When is a waveguide not a horn?

From posts #55 and #61, this thread. Line array plenums and the Beveredge lens for his electrostatic.

Now we really have gone full circle.

David S.
 

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#144
Acoustic Waveguide Model:

A string, tighly drawn between two paper cups.
And, it is not a cornu.
Within a compression driver horn assemblage, there are a lot of acoustic phenomina taking place, defraction is only on of them that has a strong influence on acoustic output.
Regards,
WHG
 
#147
To revive an OLD thread, but ask some technical advice

Referring back to the original thread, Id like to ask if anyone can help me sim this horns gain BW in Hornresp. I can easily measure the mouth area, and the 'throat' although there is no phase plug or other so maybe its just the start of the horn? So given the 2 respective areas can anyone advise me as to which horn profile to try first.

As the pic in the 1stpost of the thread shows, if it still shows, its an elliptical mouth 60° and 90°

Also I wondered IF i need a phase plug. The thought is to load a small 1" wideband driver to the front with this horn and perhaps some kind of TL for the rear part. The aim would be to create a nice rolloff to the HP function of the whole enclosure, to mate with perhaps a 8" driver. and as low as practically possible.

Anyone got any pointers?
 
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