Anyway...the term "standing wave" is misleading as the pressure wave still moves through the air. If it did not then we would hear no sound. The practical point is that the energy from waves at certain frequencies (determined by the dimensions of the room) combines with itself resulting in notes at these frequencies sounding too loud. An effective acoustic treatment needs to absorb enough sound energy to result in a room that has an even response across the frequencies. There are various ways of doing this, which is what I am interested in.
One thing about a standing wave is that it doesn't really "move" through the air. Even so, one can still hear sound that exists in standing waves (unless one is at a node).
energy from waves at certain frequencies (determined by the dimensions of the room) combines with itself resulting in notes at these frequencies sounding too loud
Or too soft, (or even occasionally the right level, and other points inbetween) depending upon where one is in relation to the wave's cycle. Standing waves also can have different dynamic characteristics from the travelling wave component of what you hear. This can possibly most obvious with frequencies which "ring" or hanging on/decay more slowly (amongst other effects) in comparison to other frequencies.
There are various ways of doing this, which is what I am interested in.
Me too :)
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The editing I did in the posts above was simply to move them to a new thread as they were wandering off topic. No-one was arguing, it was just hijacking this thread with something that was better off elsewhere. 0VU :)
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