Audio and Video
Active Noise Reduction: Can you really be within one percentage point of perfection?
.jpg&mask=151x112.png "Active Noise Reduction: Can you really be within one percentage point of perfection?")
Dr. Paul Darlington, Chief Acoustic Scientist, Phitek Systems Ltd., explains how valid power and energy data can be misinterpreted, intentionally or not, via this example using audio levels
This article looks at the second situation, specifically as it relates to Active Noise Reduction (ANR) technology. Over the past few months, an increasing number of ANR personal audio products are being marketed accompanied by claims of 99% noise reduction on retail packaging or in published technical specifications. When any technology claims to be within 1% of perfection, surely it is time to celebrate that technical achievement, or question the claim, says the author.
It takes a look at the claim of 99% noise reduction, tracing its (entirely justified) engineering origins, but questioning its appropriateness as an indication of utility and value to the customer. It's a reminder to us all that even apparently "good" data may still lead us to incorrect or erroneous conclusions, either through laziness, sloppy thinking, or a desire to see certain results.
The article is presented as a pdf document (no registration required). To read it, click here.
About the author
Dr. Paul Darlington is Chief Acoustic Scientist at Phitek Systems Ltd., http://www.phitek.com (Auckland, New Zealand), a leading supplier of electro-acoustic technologies for audio enhancement and active noise cancellation
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