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[RS] RotoSub - the fan with built in active noise control

post #1 of 10
Thread Starter 
http://www.rotosub.com/s_products_demo.php


Doesn't give you much specs but could be interesting for ppl who likes a silent computer. Guess we'll just have to wait and see if it will be a good option...
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post #2 of 10
I'd like more info
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OoGhiJ MIQtxxXA
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post #3 of 10
Thread Starter 
yeah, me too.

Seems quite new so might take a while
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post #4 of 10
could be fake for all we know
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OoGhiJ MIQtxxXA
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post #5 of 10
Thread Starter 
don't think so, they have an article at a swedish tech site... Haven't seen anything fake on that site so far
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post #6 of 10
I will trust nothing more than my ears as it's what I believe is the perfect sound level, not the sensor.
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post #7 of 10
Active sound cancellation is done by emitting the opposite sound waves so they cancel each out.

So a tiny sensor ( mic ) and some sound wave emitter ( speaker ) and a chip to regulate it automatically. Depending on how large the manufacturing scale is, the added electronics could be dirt cheap.
Also depending on how powerful the sensor is it could pick up other noise from its surrounding and minimize that too.
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post #8 of 10
^this
It means that if we had a device with a sensor and a sound wave emitter we could actually cancel all the noise made by our computers ?
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post #9 of 10
Quote:
Originally Posted by Goliath.ro View Post
Active sound cancellation is done by emitting the opposite sound waves so they cancel each out.

So a tiny sensor ( mic ) and some sound wave emitter ( speaker ) and a chip to regulate it automatically. Depending on how large the manufacturing scale is, the added electronics could be dirt cheap.
Also depending on how powerful the sensor is it could pick up other noise from its surrounding and minimize that too.
This too. Interesting concept.
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post #10 of 10
Quote:
Originally Posted by andrei.c View Post
^this
It means that if we had a device with a sensor and a sound wave emitter we could actually cancel all the noise made by our computers ?
Short answer: yes

It gets complicated when the sound sources start to get varied and the intensity must also match. So a ANR ( active noise reduction ) solution will either work at the source of the noise ( the fans ) or at the destination ( the ear ).

Since a computer has multiple sources 1 single device is not sufficient because it will cancel the noise it senses where its sensor is located, further away it might actually amplify it / distort it.

Also the problem with multiple devices is that where the sensor is the noise will be canceled but further away the sound waves they all emit will most likely interfere and create noise rather then cancel it.


I can see several problems with this ANR solution:

If the noise emitted is strong and you place more then 1 fan then there can be regions in the room where there's interference. that is if the method is actually "active"

There are methods with semi active noise cancellation where there is no sensor but there the noise emitted is fixed. So if the noise is changing it intensity ( fan revving up and down ) or pattern (somehow over time due to surrounding environment) then the noise cancellation looses its effectiveness or even makes it worse.

The 2nd method is the cheapest obviously because there is no sensor to monitor noise and there is no integrated controller to actively change speaker output to cancel the noise.

Also this technology is a few decades old ( some power plant turbines have active noise cancellation integrated in them ), so either until now it was too complex and expensive to do it for personal use, or there are technical problems in implementing it.
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Titan
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My old gaming rig
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Optical DriveCoolingOSMonitor
Samsung SH-222AB Corsair Hydro H100 Windows 7 Ultimate 64bit Dell U2412M 
KeyboardPowerCaseMouse
Microsoft Sidewinder x6 Corsair AX1200 Coolermaster HAF X Logitech MX Revolution 
Mouse PadAudio
SteelSeries QcK Marine Edition Asus Xnoar D1 
CPUMotherboardGraphicsRAM
Phenom II x3 720BE Gigabyte MA790FXT-UD5P ATI Radeon 4890 4 GB DDR3 @ 1600 MHz 
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