acoustic characteristics of bis(3-diylpropyl)aminoisopropyl alcohol zr-50 in high-end musical instrument manufacturing introduction in the field of high-end musical instrument manufacturing, the acoustic characteristics of materials are one of the key factors that determine the sound quality of musical instruments. bis(3-diylpropyl)aminoisopropyl alcohol zr-50 (hereinafter referred to as zr-50) has been widely used in musical instrument manufacturing...