they're assessing how suitable different types of wood are for making guitars and they may be on the brink of a revolution two things are crucial for guitar sound box design isn't the first to last if there are the elastic properties and especially good reflection low attenuation. of the night you also need dimensional stability so that the form is not affected by changes in humidity. elastic yet stable both properties are essential for high end guitars. brazilian rosewood and other tropical timber varieties have those characteristics. but instrument makers are facing a problem the trees sourced from the brazilian rain forest have been listed as endangered species for years in twenty seventeen trade in the timber was all but prohibited. while rosewood and other tropical woods are still available supplies