[LAD] Circular Reasoning

Dominique Michel dominique.michel at citycable.ch
Fri Aug 31 17:23:31 UTC 2007

Le Fri, 31 Aug 2007 14:59:55 +0200,
Jens M Andreasen <jens.andreasen at comhem.se> a écrit :

> Late one friday afternoon, a sound-engineer was sitting in his chair
> admiring a brand new pair of flat frequency response monitors. He then
> observed the following:
> For two frequencies represented by sine-waves and an octave apart to
> have the same relative loudness, the higher octave will need to have its
> amplitude adjusted to half of that of the lower octave.[1]
> Both frequencies will then force a membrane to travel the same distance
> within a given timeframe - the higher will go half as far but twice as
> often than the lower - and they will also both have the same speed or
> steepness at the zero-crossing.
> Surprisingly, the lower frequency consumes four times as much energy
> than the higher[2], although it is apparently not doing any more actual
> work.
> Therefore, it is a better excersize to take a walk around the block,
> rather than running around in small circles. 
> cheers! // Jens M Andreasen


It is why I go to my job with my bicycle. It take a longer time, but it is a
much better exercise as to do the same with my car. And I do not contaminate
the air of others with my bicycle. It is a word for that: respect, the only
only remedy against the destruction of the environment, the racism and their


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