I prefer some sound when going to sleep myself.Check out this..
http://www.popsci.com/article/science/fyi-why-does-white-noise-help-people-sleepOn its face, flipping on white noise before hitting the sack must be the most counter-intuitive idea out there. Want to sleep better? Simple solution: make a bunch of noise. Sweet dreams ahoy.
And yet, not only do some people swear they can't get to sleep without a fan running, there are even companies that will sell you optimized noise-makers for helping you get the best of your bed rest. What is up with our brains and our ears?
The short answer: white noise is better noise. At least for (some) sleepers.
White noise, if you're using the technical definition, is a consistent noise that comes out evenly across all hearable frequencies. Say you're a musician. To play a middle C note, you play something that's about 261.6 hertz, the unit of frequency. White noise is just an equal amount at every frequency, from low to high, that a human being can hear. To keep the music analogy going, it's a gigantic band all playing a slightly different note. (Machines pushed to the limit, like fans, are especially good at hitting these notes.)
When a noise wakes you up in the night, it's not the noise itself that wakes you up, per se, but the sudden change or inconsistencies in noise that jar you. White noise creates a masking effect, blocking out those sudden changes that frustrate light sleepers, or people trying to fall asleep. "The simple version is that hearing still works while you're asleep," says Seth S. Horowitz, a neuroscientist and author of The Universal Sense: How Hearing Shapes the Mind.
I also think there has to be some noise cancelling going on too with white noise applications.
Take for example out of phase speakers..If you hook up the stereo left channel one way and the other the opposite (+/-) then a lot of the bass will get cancelled out and distortion gets introduced.
And note i did not say "right" way.. there isn't one, they are just suppose to be "in phase".
Both should be wired the same way but this is not always the case.
Sometimes they can get screwed up.
If you put a few volts on a speaker super quick you can see which way the polarity is on it.
That should push the speaker
out briefly (
making a squawking noise).
Switch the wire polarity around and it will suck
inwards instead..
BUT !Did you all know that it doesn't matter which way ?
Your speakers will work the same regardless if they suck in or push out..
makes no difference !The important part is both suck in or both suck out.. or they are out of phase, which is bad.
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Want to test a home speaker ? Some say use a 9 volt battery but i did not have one so I used a 6 volt DC adapter plugged into the wall from a home phone and that worked well. Some people online say 12 volts is ok but i would not go that high.
And just tap the voltage on the speaker contacts super quick.. you only want to tap the speaker for a half a second just long enough to see which way the cone is going.
When i did it that way a few months back i tested on full size speakers with a 10 woofer plus mid range and a small tweeter.
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