Assertion: sounding board | /r/MadeOf | spruce
Facets:
Source sentences:
text: The guitar top, or soundboard, is a finely crafted and engineered element made of tonewoods such as spruce and red cedar.
text: The soundboard is made of spruce that is 0.25-0.375 in (0.635-0.95 cm) thick; it acts as a natural resonator, is strong for its weight, and can be vibrated by the strings because of its lightness.
text: Thereby, for example, a portion of the soundboard made of spruce may be removed and replaced with a portion made of mahogany.