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In the Forum: Audio Discussions
In the Thread: Constructing LF modules to the limits
Post Subject: Is there any tone in the ULF range?Posted by be on: 9/27/2011
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It seem that the concensus here is that there is no tone in the ULF range, something like below 50Hz.
This is probably not true for live acoustical instruments.
Physical systems that can be described by non linear differential equations, are known to produce subharmonics of there fundamental frequency, combination frequencies of these and the harmonics and on top of this: harmonics of the forementionned!
Acoustical instruments are highly nonlinear mechanical devices and does indeed demonstrate these phenomena:
http://en.wikipedia.org/wiki/Subharmonics
Further, some instrument has an almost DC component as well, try to say the letter sound of "P" loudly.
Rgds.
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