Tuesday, June 13, 2006

How high do you go?

Back from the GP (very hot and LOUD), and hopefully I'll have some pictures up later in the week. Anyway, this article is truly fascinating. Human beings can hear sound in the range 20Hz to 20,000Hz, but this range decreases with age. Someone thought that the high end of the range (which most adults can not hear) could be used as a "child repellant". The article includes sounds in the range 10,000Hz to 25,000Hz, so that you can see where your limit is. The 15,000 limit was very divisive, with many of my colleagues thinking that it was all a hoax and that we were pretending to hear something.


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