plug in your speakers
A sound wave's pitch is determined by its frequency; that is its cycles per unit of time. The sound wave's intensity or volume is determined by its amplitude; the maximum crest of a sound wave.
An amplifier amplifies the input voltage. That gives you more volume.
LINEAR electronics deals with circuits which the input and output values can be any value from zero to the maximum. For example, amplifying sound and adjusting the volume out you can continuously change from no volume to maximum volume. Contrast this with DIGITAL electronics where the values are on or off, or vary in fixed steps.
A hollow guitar body gives the most sound in acoustic guitars. For pure volume, a larger body will give more sound. For the purest sound, a body with well tunes harmonic vibrations will give the purest sound.
There is no theroetical maximum sound. It can always get louder
The Dreadnought is a steel strung acoustic guitar with a large body so gives off a lot of volume for an acoustic also due to the large sound chamber gives off good bass tones.
volume
The amplitude of a sound wave is a measure of the distance between the rest position and the maximum displacement of the particle from its rest position. It is equal to half the total displacement of a vibrating particle.
The amplitude of a sound wave is the same as its volume.
The difference between pitch and volume is pitch is tone, and what a sound is, and volume is how loud a sound is.
"Volume" is a term referring to how loud a sound is to humans and animals. Most entertainment devices that use sound have a "Volume Control", typically labelled, "Volume". Volume is not quite the same as "Loudness", by the way.
What is the maximum sound level is safe for human ear