Hi, A question popped into my mind which I've never thought of in 20 years of making music: when you hold a tuning fork against a simple resonator (a guitar body, a table, any object with some volume really), the resonator amplifies the tuning fork's sound and you hear the tuning pitch louder. I've read that this works because of the way the tuning fork is designed: the oscillating tines move horizontally and transmit vertical oscillation to the handle, which isn't dampened when holding it. The vibrations are then transmitted to the resonator by physical contact. My question is: why is the resonator amplifying the tuning fork's frequency rather than resonating at its own natural resonant frequency (cf. singing a note close to a guitar at a specific pitch will make the guitar resonate and amplify that pitch)? Thanks a lot for your help.