since i'm getting bs from yahoo, i figured to ask here....
"can you hear 40hz and below bass & LFE signals from approx 6-14 ft away from the subwoofer?"
then what's this nonsense about a 20hz signal being 54ft long?
okay, take the BIC PL-200 for example, it extends to 22hz, but there is a weak signal from 10-20hz. say the sub is 14ft from your listening position...
will i feel or hear those low bass waves?
Human hearing is often quoted to cover 20Hz to 20kHz. So you can hear 40. The distance part has more to do with initial volume, but assuming normal listening volumes I'd guess yes, you can, though others will surely correct me if I'm wrong.
Not quite, that has to do with standing waves and SBIR. Walls reflect sound (think in a same way a mirror reflects light). This reflected sound hits the incoming sound wave, and can end up cancelling (the peak of the reflected wave lines up over the trough of the incoming wave) it or boosting it (the peak of the reflected wave lines up over the peak of the incoming wave).
That is a whole different issue from what frequencies you can hear.
You can hear bass at any distance, such as 30hz with headphones or putting your ear right up to the subwoofer cone.
Humans can hear down to 3-5hz if the SPL is high enough, like say 130-150db.
Sound drops off at a rate of 6db per doubling of distance, and for high frequencies it's actually a little faster since there is also an air absorption factor.
But in a room, you have 6 surfaces, and those surfaces reflect the waves back into the room, which can cause either a nullification of SPL or amplification of SPL depending on exact room dimensions, subwoofer placement, listener position, absorption panels, wall mass/rigidity and the wave-length being played... so it's not always a 6db reduction when more distance is added. Additionally, there is also room-gain boost for bass below 20-25hz (in non-large rooms.)
With multiple subwoofers and at deep frequencies, because of room-gain it is entirely possible for bass to be louder at the back wall and corners of a room than directly in front of any given singular-subwoofer because of how the long waves sum together.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
AVS Forum
34M posts
1.5M members
Since 1999
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!