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bjm362 wrote: LEGAL DISCLAIMER !
Here it is in a nutshell. One of the first things you learn studing the design of loudspeakers is that the speed of sound is NOT constant ! It varies accordinng to the DENSITY of the medium AND the FREQUENCY of the signal! Higher frequencies travel faster than low frequencies. Low frequency horns typically require more length than high frequency horns which in turn creates a time alignment conundrum.
I have absolutely no idea what you are talking about,but I didn't want you to feel left out in my responses !
Tony Wilkes wrote: Probably took his eye of the ball when he was looking after his donkey or was it his motor car. !!!
I don't have the plans, but there is a pretty good example on wikipedia!
Heathrow_B_Line wrote: I would like to build some unity horns, do you have the plans?
or know where I can view them?
Tony.A.S.S. wrote: Is there any written proof that when it comes to the speed of sound, HF travels faster than LF? At the moment I can't see knock on effect of air molecules being faster for HF than LF. Admittedly, bass waves are longer than HF, but that doesn't mean the speed is different.
Yes there can be confusion if a system is poorly aligned,remember That stereoscopic sound creates 3 dimensional auditory imagery.
Tony.A.S.S. wrote: Is there confusion because bass seems slower in response than HF? To me, this is mechanical limitations rather than a slower knock on effect. While we're on the subject, When it comes to time alignment, in the bass for instance, where do you think the alignment point is for a frequency that is 30ft long. Is it in the front, middle or back. Answers on a postcard please.
Fortunately, I don't concern myself with such things, because I have a machine that does it all for me.
bee wrote: if it is 30ft long would you not measure it at 30 feet.......... just a guess..... on another point if sound travels at differant speeds then you could never fully time align a system....... unless you align it to x point..... but if you stand 1 foot back from x point it would be back out of align again...... just a theory......