How Acoustic Guitar Tops Move - In Action

[walrus]

The LTG excels at this.

Exactly! I must admit I'm glad I didn't read any of this earlier. I spent some of the day today working on some tricky chords for a song. It's hard enough without worrying about how my guitar top is resonating, "natively" or otherwise!

 

[adorshki]

Extremely interesting

If I try to find the resonant frequency using oscillator-amp speaker - all of which I have - should I take the strings off ?
I'm leaning to taking them off for this "humming test".

Just thinking that w strings on their tension affects any measurement.

Naturaly all this leads to an endless rabbithole - detuning the guitar higher or lower - as long you play alone.

It should be done with strings at tension as this is part of the equation determining resonant freq.

Corollary:
I first discovered nn my D25 I can make each of the E-A-D-G strings vibrate by humming that pitch into the soundhole, but they all do it, the D40 most pronounced in "A". Top vibrations start to vibrate strings in a reverse energy flow.

 

[adorshki]

Exactly! I must admit I'm glad I didn't read any of this earlier. I spent some of the day today working on some tricky chords for a song. It's hard enough without worrying about how my guitar top is resonating, "natively" or otherwise!

I can't relax unless I know my top is loose enough to do some real harm.

 

[Christopher Cozad]

Extremely interesting

If I try to find the resonant frequency using oscillator-amp speaker - all of which I have - should I take the strings off ?
I'm leaning to taking them off for this "humming test".

Just thinking that w strings on their tension affects any measurement.

Naturaly all this leads to an endless rabbithole - detuning the guitar higher or lower - as long you play alone.

You may be surprised... string tension doesn't play as much a role in affecting the resonant frequency, as it does determining the shape(s) of the frequencies as the strings are plucked. But that is, indeed, another rabbit hole.

It is not necessary to remove the strings, or to damp the strings, if you are simply humming into the soundhole. You may want to limit your sniffing, especially if people are watching.

If you are applying a tone with a speaker resting lightly on the soundboard (for example), and trying to measure the vibration, you can pick up a whole lot of harmonics if you don't at least damp the strings (usingcloth or a piece of foam, etc).

 

[adorshki]

Exactly! I must admit I'm glad I didn't read any of this earlier. I spent some of the day today working on some tricky chords for a song. It's hard enough without worrying about how my guitar top is resonating, "natively" or otherwise!

And then there's banjo tops.

 

[Rich Cohen]

This thread is amazing, if not truly over the top LTG-ing. I love it and appreciate everyone's expertise.

 

[walrus]

This thread is amazing, if not truly over the top LTG-ing. I love it and appreciate everyone's expertise.

Yes! Using LTG as a verb! Nice, Rich!

 

[adorshki]

Yes! Using LTG as a verb! Nice, Rich!

It's a Yiddish thing. Like "schmooze" (not to be confused with "Shmoos")

"This certificate is available through Banks and Post Offices all over America. It will be signed in the names of children for whom a U.S. Savings Bond is purchased."

Shmoos R Us.

 

[Westerly Wood]

“Dude you got so Hans’d right there”

“Yeah, that dialogue was pretty good, but you could have LTG’d it way more”.

 

[Rich Cohen]

Yes! Using LTG as a verb! Nice, Rich!

I can't help it...I'm a linguist by training.