Re: Do Pickguards Rob Your Tone?
Another Analogy...
On an acoustic guitar, the strings vibrate which creates sound waves which travel to the soundboard of the guitar. They thus vibrate the top of the guitar (and the back, but to a much less extent) and cause us to hear the sound of the guitar amplified by the body, etc.
Do you think the guitar would have the same resonance and sustain if someone covered about 60% of the top of the acoustic guitar with a pickguard? I think not. The plastic would dampen the vibrations and cause a loss of tone. Major tone suckage.
I know this is probably an extreme example, but the physics related principles still hold true with solid body guitars.
And if you have the argument that "oh, the vibrations of the strings just go into the sound hole, etc blah blah" well, there are a few guitar makers that locate the soundhole AWAY from the strings, so yeah...the top of the guitar is in fact being vibrated by the energy from the strings transmitted through the air, the bridge, and the nut.
Like someone else said, no. On an acoustic guitar, the string nut and bridge transfer vibration into the body, which then resonates the air inside the guitar, producing tone. The main vibrating piece in an acoustic is the sound board, i.e. the top.
As for electric, the strings do transfer vibration to the body through the string nut and bridge / tremolo, but the sound is made electrically using pickups.
The electric guitar is not going to vibrate that much when you strum. It will vibrate/resonate, yes, but not much. Neither does an acoustic guitar. Yet for how little they vibrate compared to the strings, it's the transfer of vibration through direct contact that causes the sound.
Still, the point is that the electric guitar won't make much sound: it's not set up to play acoustically. Sure, it can, but it's not meant for that as a main goal.
Air transfers vibration much more poorly than direct physical contact. Case in point: try punching someone, but so that your fist does not touch them but comes within 1" of them or less. That doesn't hurt at all. But then punch them and contact them. That hurts. Transfer of energy is best when it's direct contact. Your ears work the same way: while the sounds they hear are through the air, internally they use direct contact to transfer the sound energy because it's much more efficient. Your ear uses liquid and bone to move the energy.
Anyways, hope this helps you. Maybe, like me, you need to read up on engineering. It's good stuff to at least know, even if you're not an engineer. Psychology is another good read, so that you can understand people and such, but anyways, I digress....