1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Sub-bass pattern effects @ 30-70 Hz

  1. Nov 11, 2011 #1
    I'm working on some paintings about the effects of sub-bass in the 30-70hz range.
    I've been trying, without success, to find info online about the likely pattern effects it could produce, say in water or sand, or anything that its wave patterns would show up in. Any clues anyone?

    Also, bearing in mind that I have pretty much zilch physics knowledge, I also realized that I don't have a clue about how to work out what physical distance a single sub-bass wave would cover, Any simple hints on how to do that would be greatly appreciated.
  2. jcsd
  3. Nov 11, 2011 #2
    Oh and also, although this should probably go into the biology forum, what happens when the waves hit the body, how are the waves affected.
  4. Nov 11, 2011 #3


    User Avatar

    The patterns will depend heavily on the room shape and properties, so there's nothing really specific that can be said about that. As for the wavelength, the speed of sound at normal conditions is around 1100 feet per second, so a 30Hz wave will have a wavelength of around 36 feet. A 70Hz wave will be more like 16 feet. Because of this long wavelength, the patterns that would show up (if you had a sufficiently loud wave) would only really manifest in large areas.
  5. Nov 11, 2011 #4
    Thanks for that.

    I guess that explains why some parts of a room exhibit more sub-bass than others then, not just related to distance from the speakers, because of interference patterns and different absorbstion rates??
  6. Nov 12, 2011 #5
    Yes that's right. Also floors, walls, and ceilings may resonate.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - bass pattern effects Date
Why do you some time only hear the bass when listening to music Nov 11, 2012
How does bass shake your room? Mar 17, 2010
Resonance, standing waves and bass Feb 5, 2008