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...