Quote from: nhminer on December 18, 2014, 02:46:23 AM

Quote from: TracerX on December 17, 2014, 07:35:14 PM

Quote from: opentoe on December 17, 2014, 07:32:58 PM

5 SP20's right under your bedroom. You MUST live alone? I have an attached garage, which I tried my SP10 in and still couldn't keep it there from those high pitch fans. Then you wouldn't believe what happened. My good friend brought over his 2 SP10's and told me to go into the house, while he was in the garage. I heard him start up his SP10's then turn then off. He called for me to come out into the garage and low and behold the 2 SP10's were running! He made this audio box, same width size of the SP10. Has a bunch of what looked like speakers to me installed in it and the box was connected to some control with a few knobs on it. He turned one of the knobs slowly and the sound started to get louder and louder. I know nothing about frequencies or audio waves, but all the box does is cancel out all the audio/frequency waves from the miners. Not sure how it works, but since he wants to sell them, he wouldn't let me take a picture. Trust me, it was just a plain wood box with many different sized speakers I think. He said he has a few versions he's working with and making them variable tuning so the timing and frequencies aren't tied to one miner rig. Which would be impossible anyway, maybe our ears think they all sound the same, technically they are not. He was showing me all this on some meter be brought over. When he sells them he said he would make a post here with a youtube video. I don't know any of the details.

Neat! Here's some more data on how that works: http://en.wikipedia.org/wiki/Active_noise_control

Guy/Zvi - listening? Built-in active noise cancellation. I'd easily pay extra for that option on my sp20!

Silly, active noise cancellation does not work for random spot in your room. It needs to be tuned at one spot. This is why in engine room of a ship, they use headset still.