Re: [Phys-L] sound

[Bernard Cleyet <bernardcleyet@redshift.com>]

On 2013, Apr 12, , at 04:21, "Anthony Lapinski" <Anthony_Lapinski@pds.org> wrote:

> That changes the harmonics/frequencies, but does that
> change v in the equation? I thought v was the speed of sound in air (343
> m/s) for brass instruments.


Not yet discussed.

thinking transverse wave speed varies w/ wave guide dimension, perhaps, so do longitudinal.

Search result poor except:

http://books.google.com/books?id=7mkyAQAAMAAJ&pg=PA147&lpg=PA147&dq=speed+of+sound+in+a+tube+small+diameter+OR+waveguide&source=bl&ots=WUzDleWXB9&sig=Zd4gSHH3qTe2OOZDcf0BMcM80u8&hl=en&sa=X&ei=8pJoUa3xKaKRiQK2noC4Aw&ved=0CDgQ6AEwAg#v=onepage&q=speed%20of%20sound%20in%20a%20tube%20small%20diameter%20OR%20waveguide&f=false

Note is for short intense pulses.

bc remembers a SR thesis (UCSC) on the character of sound in glass tubes, but may have been only as a filter, not speed.

p.s.  continuing search result:

Interesting, no?

https://docs.google.com/viewer?a=v&q=cache:w9-0HiPbt34J:www.gravitycentre.com.au/wp-content/uploads/2009/09/05.complete13.pdf+&hl=en&gl=us&pid=bl&srcid=ADGEESgf75m01Zi-RRXyjc48G_cQVZENNjRZZwxTXCai_Qb5AG4ARonay1JwzWG-WNRwymYP967RA6vhFPpKF91-tvY1VYUOGPM_7GyU2Zevuh9IASapUoyVuMany8ku8cNMrhaYhe2k&sig=AHIEtbR9u15zkR_NDgoypUOT5RngaXX1DA

Wall thickness from speed in a water filled pipe:

http://echologics.com/wp-content/uploads/2012/06/Columbus_White+Paper1.pdf

reminds me of superluminal:

http://garoongatewaytoscience.com/court-of-waves/echo-tubes/

enuf.