Guitar nodal lines research

[SEAWOLF97]

rather interesting article


Researchers at Cardiff University reporting at the Acoustical Society of America meeting have presented striking images of stringed instruments made using "holographic interferometry", which allows them to visualise precisely how and where the soundboards of instruments vibrate

http://www.bbc.co.uk/news/science-environment-13573631

[grumpy]

Just like the 'vintage' L112 product sheet,
and '82 home catalog cover :)

http://www.lansingheritage.org/images/jbl/specs/home-speakers/1980-l112/page2.jpg

http://www.lansingheritage.org/images/jbl/catalogs/1982-home/page01.jpg

(cool pics and technique usage)

[SEAWOLF97]

.
Shock waves emanating from a trombone have been caught on video for the first time, researchers say.
It was first suggested in 1995 that the intense pressure waves, which can briefly exceed the speed of sound, could come from trombones.



The team measured the pressure at the instrument's mouthpiece, in the middle of its length, and at the output, and witnessed how the train of compression waves built up to the more abrupt shock wave, traveling briefly at about 1% higher than the speed of sound. :blink:



http://www.bbc.co.uk/news/science-environment-13574197

[grumpy]

That would explain the blatting noises that resulted
back when I used to play ;) (or not)