How does a guitar make a sound?

The loudness of a sound corresponds to the amplitude of a pressure wave; the higher the pressure at the peak of the wave, the louder the sound seems to us. The only real way to get a louder sound out of a string is to put more energy into the string, probably by plucking it harder. read more

However, if the guitar string is attached to a larger object, such as a wooden sound box, then more air is disturbed. The guitar string forces the sound box to begin vibrating at the same frequency as the string. The sound box in turn forces surrounding air molecules into vibrational motion. read more

A guitar produces sound the same way any stringed instrument does: when you strike a string, the force from picking or plucking the string causes the string to vibrate. The length, weight, and tension determine how quickly the string vibrates back and forth — the frequency of the vibration. read more