Why does one particular note (G-string, 9th fret) make all my strings vibrate?

[Balkan]

Just acquired a 72 P-Bass which I love, BUT, when I play the E on the 9th fret of G string it causes a continuing hum even after I mute the string. Annoying because it causes dissonance with other notes. I finally realized the hum goes away when I mute ALL my strings, because what's happening is that the other strings are vibrating. Any thoughts on why this is happening? Not an issue with any other notes as far as I can tell.

[Magneto]

The same thing happens with my ESP F-204 at that same fret, although I'm downtuned 1/2 step.. I never noticed it before downtuning, so I am not sure if the problem existed before.

The only thing I know is that certain notes can cause the neck to resonate at that frequency and usually either cancel a note out (deadspot) or cause other strings to vibrate.

I guess a person could experiment with devices like the fatfinger or by clamping something onto the headstock that might change the way the neck wood vibrates. I've noticed that different truss rod tensions sometimes change or shape this. I've heard that some have success with bolt on necks by increasing the neck to body transfer with threaded inserts and machine screws instead of traditional woodscrews..

Mag...

[Kobaia]

overtones, and the harmonic sequence.

you're playing an E. E's harminoic sequence is E F# G# A# B C# D
so your E and D string are going to vibrate hard because D's Harmonic sequence is D E F# G# A B C and D. and then you have the A string harmoic sequence which is A B C# D# E F# G. and the low B would be B C# D# E# F# G# A.

i'm sure you can notice all the similar notes

[Balkan]

Thanks for the tips. I'm noticing that my old MM Stingray does the same thing on the same fret, but it's just much less noticeable. Weird. In any case, I'm dealing with it now by holding my fingers so as to mute the other strings.