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Re: [Phys-l] Bad physics? coupled oscillations - Disdainful Responses?


On 2011, Sep 06, , at 20:16, brian whatcott wrote:


Nothing in the original note specified the stiction-excited oscillation
was longitudinal.
In view of the paper supporting the transverse coupling of an organ pipe
wall
into the air column, why not suppose that this is EXACTLY what was meant,
rather than the usual displays of superior disdain? :-)

Disdainful

Experimentally, for the descriptions I've read, longitudinal modes have a much higher Q than transverse in beams. Note Paul's description at the beginning of the page I linked previously. Again:


http://www.exo.net/~pauld/summer_institute/summer_day11sound/ringing%20_Al_rod.html

bc thinks coupling of an air column in a tube to the tubes longitudinal vibration is very weak.