sound wave speed and other ways they behave/react.


I have this week free to play with acoustic treatments and more. I looking for more info, some type of reference if you will. It need not be a thousand pages long, something to guide me. Im planning to build more absorption and diffusers. That sort of reference would be helpful. Illustrations of frequencies and how they behave across the spectrum, there width and speed, that sort of thing. I have a room to work on and I’m starting with a clean canvass, 18L’ x 12’H x 7 1/2H.

All that exists is a cloth 3 seater sofa and an area rug that covers approximately 80% of the cork floor. I will leave an equal sized border at all four sides for now The walls are framed, all but one contain fibreglass pink. The option is there to add pink between the floor joists. As it is they are all open. I’m trying to stay away from a suspended ceiling. But sound before looks, I would rethink the covering.
meerzistar

Showing 3 responses by geoffkait

An experiment involving the speed of sound of acoustic waves: place three bowls of very cold tap water on the floor out in front of the speakers, with bowls arranged in a row left to right, one bowl located between the speakers. Listen to a familiar recording before and after placing the bowls of water on the floor. If you’re still not convinced remove the bowls and put them in another room (where they won't interfere) then listen again.



stevecham
2,251 posts
05-25-2016 7:14pm
"Geoff: your experiment designed to prove exactly what?"

It’s designed to illustrate how temperature of the air affects the speed of acoustic waves in the room. I.e., the acoustic waves nearer to the floor where the air is colder would be moving slower than the acoustic waves higher up in the room. Thus, the top of the acoustic wave would bend over the rest of the wave, like a wave coming into shore. And the listener would hear more of the sound.

gs5556
589 posts
05-25-2016 11:12pm
"Wouldn't the increase in humidity nearer the floor speed it back up? (Speed of sound is not just temperature dependent)"

good point.  The speed of sound is much more sensitive to temperature than to humidity. So the answer to your question is no.

cheers