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Technology Stocks : Noise Cancellation Technology (NCTI)
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To: Hans Reuchlin who wrote (2338)10/15/1998 9:57:00 PM
From: MIKenn  Read Replies (1) of 2775
 
Here is another challenge to your concept:

Active noise cancellation is most successfully applied to low frequencies with long sound waves. They are less volatile (do not bounce around as much) and you have better capability for maintaining a high signal-to-noise ratio (with a high quality microphone, that is). Otherwise, you will only add energy and noise to your environment. Furthermore, with higher frequencies, you would need more computing power and speed in your DSP (digital signal processor) to deal with the increasing complexities of high frequency noise.

You also need a powerful amplifier to match to noise source.

But the greatest challenge may be the speaker itself! Not having seen the speaker specs. or even a demonstration, I would be surprised it has the low frequency response necessary to cancel noise. It may not have the depth to create low frequency noise!
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