I've been thinging about this for years. Active noise cancellation uses the idea that if you send the opposite wave of a sound you can cancel a signal out. You use a Digital Signal Processor to do the on the fly calculation. It works really good for cyclic type sound. (i.e. fans). It's commonly used in traffic helicopters. Noticed how the chopper noise has been gone the last few years on reports? They also have headphones that you can buy with it installed basically used in office work. It could be easily modified to be used on a computer.
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I've been thinging about this for years. Active noise cancellation uses the idea that if you send the opposite wave of a sound you can cancel a signal out. You use a Digital Signal Processor to do the on the fly calculation. It works really good for cyclic type sound. (i.e. fans). It's commonly used in traffic helicopters. Noticed how the chopper noise has been gone the last few years on reports? They also have headphones that you can buy with it installed basically used in office work. It could be easily modified to be used on a computer.