The definition of "Resonance"

[Richard Brekne]

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Hi folks... more interesting stuff for your edification.

Much has been made of the definition of the term "resonance"
on this list, and there are some who insist on defining it
strictly in the direction of "resonant frequencies".

If you refer to the following URL you may find some
interesting things and links to more interesting things.
http://www.physics.georgetown.edu/~vincenz/ssm/ssm-Lect11.html

Here is a quote taken from that side I thought might
interest many.


        "  DEFINITION: Resonance is the process in
     which oscillations in a system are produced,
     maintained or enhanced by means of a periodic
     transfer of energy from another oscillating
     system, whose frequency is identical to that of
     the first system.

     NOTE : True resonance requires the presence of
     either two coupled oscillating systems (such asa
     the two carts), or one oscillating system and an
     incoming wave(such as the two tunning forks) with
     matching frequencies of vibration. There are
     situations when the energy is supplied
     continuously, but the oscillating system only
     accepts energy in periodic pulses by other
     processes such as auto-excitation or positive
     feed-back (to be discussed later) that mimic
     resonance. "

This definition clearly allows for the use of the term
"resonance" such that a soundboard can be described as a
"resonator" it would seem.



--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no


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