Another interesting technique is the use of harmonics. A harmonic is a bell-like sound that is produced by lightly touching the string directly above the fretwire, then picking the string. The string is not pressed against the fretboard.
The easiest harmonics to play are natural harmonics, found at the 5th, 7th and 12th frets. Listen carefully to the recording to hear the correct effect for this technique. Harmonics are notated on the tab with a dot and the wording har. … above the tab.
Here is an example which makes use of natural harmonics.