Acoustic players often use the guitar as a percussion instrument, tapping or slapping the guitar to produce percussion sounds while playing.
The most common percussive technique is to tap a back beat (on 2 and 4 in a 4/4 pattern) while playing. Tap the strings firmly and quickly with the palm of the right hand, causing them to slap against the fretboard.
When using as pick, a quick strum while slapping enhances the snare simulation.
When using fingers, flicking out the fingers rasgueado style (like a flamenco guitarist) can enhance the simulation on muted strings, or play notes on upper stings in a slap-and-flick manner.
With hybrid picking, a combination of both is possible.
To simulate a bass drum on beats 1 and 3, thump the body of the guitar with the palm of the right hand. The thump can occur anywhere on the guitar body the produces a low pitch, but often occurs near the sound hole to give the player access to the strings. Use the thumb to slap a bass note on the lower strings while playing, or flick out the fingers to strum a partial chord.
Flick the fingers of the right hand against the pickguard to produce a higher pitched percussive sound. This can be alone, or in conjunction with flicking across the upper strings.
Either hand can tap the guitar bongo-style anywhere on the body to produce a percussive tone. Taps on the sides of the guitar produce a higher pitched sound. When tapping the body with the left hard, hammering notes on the guitar with the right hand is quite impressive musically and visually.