Noun
a hole in a soundboard (as of a violin) designed to resonate with the tones
Source: WordNetA round or oval sound hole may be covered or bordered with decorative rosettes or purfling. Source: Internet
A pickguard is glued below the sound hole under the strings. Source: Internet
In all lutes the soundboard has a single (sometimes triple) decorated sound hole under the strings called the rose. Source: Internet
The body of a classical guitar is a resonating chamber that projects the vibrations of the body through a sound hole, allowing the acoustic guitar to be heard without amplification. Source: Internet
Like the bowlback, the flatback has a round sound hole. Source: Internet
The fingerboard was lengthened over the sound hole for the e strings, the high pitched strings. Source: Internet