A Violin Maker Taps Wood and Listens
A violin is made from only a few thin pieces of wood, but each piece has to be just right. The craftsperson who builds violins is called a luthier. A luthier works with both hands and ears.
The top of a violin is usually carved from spruce, a light wood that vibrates easily. The back and sides are often made of maple, which is harder. The luthier carves the top and back from thick blocks, shaping each one into a gentle curve. The wood is scraped until it is only a few millimeters thick in many places.
How does a luthier know when to stop? By tapping. The maker holds up a plate of wood and taps it, listening to the note it rings. A thinner plate rings differently from a thicker one, so the sound is a clue. If the plate sounds dull, the luthier may scrape off a little more wood. If it is too thin, it can be weak or crack.
When the pieces are finished, they are joined to make a hollow body. The maker adds the neck, the strings, and a coat of varnish. The varnish protects the wood. Finally, the luthier plays the instrument to hear how it sounds.