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View Full Version : How do guitars make their sounds?


Tingly
April 10th, 2006, 11:56 AM
I tried asking something like this, but not exactly this quesiton, in "Tools," back in March. 'Got two responses, mostly about wood. Reverend's thread about his finger making noise got me re-interested in the idea. If this thread's gotta be moved, I apologize.

I wanna know HOW guitars actually "make" the sounds they do. We should be the people who know, right?

WHAT I READ

I read that, when an acoustic guitar's string is plucked, the string actually vibrates the bridge mainly, and that is what pushes and pulls the soundboard, or "top," of the guitar and that's what makes the vibration you hear in the air, as "a note.".

Is that correct?

If that is not correct, or not the whole story, what is the right information?

OVERTONES

I also know that the string vibrates with "overtones," not just up and down, which is why the guitar is such a "rich sounding" stringed instrument. What's that all about? Does the string go up and down once, and then vibrate by thirds, or what?

ELECTRIC GUITARS

In the same vein, how do electric guitars make their sounds? Is it the same way acoustics do, except for the "metal string moving in an electric-field-coil" thingy? I wouldn't think so, since the top doesn't seem to vibrate the way an acoustic does. What is the difference betweeen a a solid body electric and a semi-hollow body, like an ES-335? Does that effect the sound of an electric, and, if, so, why and how?

Who knows this stuff and where is the data?

mishmannah
April 10th, 2006, 12:01 PM
Brace yourself for some science... (http://www.phys.unsw.edu.au/~jw/guitar/intro_engl.html) :)

Tingly
April 10th, 2006, 01:07 PM
Very cool!

Thank you!

The Reverend
April 10th, 2006, 01:49 PM
This page is really useful: http://www.phys.unsw.edu.au/~jw/strings.html

Thanks!

Tingly
April 10th, 2006, 02:39 PM
Holy Mackerel!!

This stuff is amazing. And that is all going on EVERY time I play a note! Real life is incredible.

GapToN
April 10th, 2006, 02:43 PM
thats why acoustically, acoustic sounds better then electric :P

i was going to say something about how the top/side and back vibrates but those websites have it all LOL

TomEst
April 10th, 2006, 03:18 PM
i was gonna try explain, probably wrong but i think electric works same way as a telephone, i.e. vibrations change the electromagnets which change the current(i.e.current/flow of charge fluctuates) which then comes out the other end as noise!

if im right i shall be very happy, cos i thought i was doing bad in science.

Tingly
April 10th, 2006, 03:44 PM
I can understand the differences in wood make, for an acoustic. But what role does Alder or Ash play in an ELECTRIC guitar?