From the looks of it, they're just using differential signaling. This technology is already being used in USB (for data integrity) and noise cancellation. The science involved uses two channels:
Channel 1 (y) has the original signal/waveform (eg: y = x+1) *see 1st graph (Original Signal) Channel 2 (-y) has the negated signal (eg: -y = -x-1)
Both of the signals are sent in phase (at the same time) with each other from the source (output of waveform generator). The transmission of signals from source to the input (speaker module) gathers noise. Noise can be attributed from your home power lines, running a blender, or turning on large machinery. Noise affects both channels uniformly, so:
Let's say noise = +2 Channel 1 with noise is now (y+noise = x+1+2 = x+3) *2nd graph Channel 2 with noise is now (y+noise = -x-1+2 = -x+1) *3rd graph
Both channel 1 with noise and channel 2 with noise enter the speaker module. The speaker module decodes the original signal (y = x+1) by simple signal subtraction and amplitude reduction (by a factor of 2).
original signal = [(Channel 1 with noise) - (Channel 2 with noise)]/2 original signal = [(x+3) - (-x+1)] / 2 original signal = [x+3 + x -1] / 2 original signal = [2x+2] / 2 original signal = x+1 *4th graph
Now that the original signal is obtained, it is then sent to the speaker driver. The speaker driver powers the physical speaker to play the decoded waveform. That's it! It's quite simple actually!
I hope you enjoyed this, Roman Sandoval romansandoval.com
the noise is a physical limitation of the speaker. And what you are talking about is re-active, this system would be calibrated and would be based on the input signal and knowing how the main speaker is going to react.
Yow. That's the math end they didn't quite teach us in music school...
Basically, it's impossible to recreate sound without any noise just caused by environmental factors, like 60-cycle hum from your outlet, fluorescent lighting in the room, speaker components vibrating, etc., so what you hear is pretty close to the actual sound, but not exactly what came out of your device, because your playback medium changed it ever so slightly.
This contraption says that it can generate an out-of-phase signal that will only cancel the bad noise...interesting, if it works. Any time I'm doing digital audio work it's tough to clean up noises you don't want without also losing a teeny bit of what you do want. I'm a little skeptical, but okay Toshiba, bring it on.
The link provided speaks of noise caused by the poor construction of the speaker case and build of the speaker components, this isn't about signal noise at all.
The Triumph proved to be one of the better looking and performing pre-paid handsets we'd had the pleasure of holding in our sweaty mitts, but we had one major hangup: the name.
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From the looks of it, they're just using differential signaling. This technology is already being used in USB (for data integrity) and noise cancellation. The science involved uses two channels:
Channel 1 (y) has the original signal/waveform (eg: y = x+1) *see 1st graph (Original Signal)
Channel 2 (-y) has the negated signal (eg: -y = -x-1)
Both of the signals are sent in phase (at the same time) with each other from the source (output of waveform generator). The transmission of signals from source to the input (speaker module) gathers noise. Noise can be attributed from your home power lines, running a blender, or turning on large machinery. Noise affects both channels uniformly, so:
Let's say noise = +2
Channel 1 with noise is now (y+noise = x+1+2 = x+3) *2nd graph
Channel 2 with noise is now (y+noise = -x-1+2 = -x+1) *3rd graph
Both channel 1 with noise and channel 2 with noise enter the speaker module. The speaker module decodes the original signal (y = x+1) by simple signal subtraction and amplitude reduction (by a factor of 2).
original signal = [(Channel 1 with noise) - (Channel 2 with noise)]/2
original signal = [(x+3) - (-x+1)] / 2
original signal = [x+3 + x -1] / 2
original signal = [2x+2] / 2
original signal = x+1 *4th graph
Now that the original signal is obtained, it is then sent to the speaker driver. The speaker driver powers the physical speaker to play the decoded waveform. That's it! It's quite simple actually!
I hope you enjoyed this,
Roman Sandoval
romansandoval.com
I think you may be going in the wrong direction.
See my above post.
the noise is a physical limitation of the speaker. And what you are talking about is re-active, this system would be calibrated and would be based on the input signal and knowing how the main speaker is going to react.
Or even more simply stated, destructive interference ftw
Yow. That's the math end they didn't quite teach us in music school...
Basically, it's impossible to recreate sound without any noise just caused by environmental factors, like 60-cycle hum from your outlet, fluorescent lighting in the room, speaker components vibrating, etc., so what you hear is pretty close to the actual sound, but not exactly what came out of your device, because your playback medium changed it ever so slightly.
This contraption says that it can generate an out-of-phase signal that will only cancel the bad noise...interesting, if it works. Any time I'm doing digital audio work it's tough to clean up noises you don't want without also losing a teeny bit of what you do want. I'm a little skeptical, but okay Toshiba, bring it on.
The link provided speaks of noise caused by the poor construction of the speaker case and build of the speaker components, this isn't about signal noise at all.