Experimental Study on the Vibration of Membranes and Generation of Sound in a Snare Drum with Extended Proper Orthogonal Decomposition

抄録

This paper presents the findings of a study carried out on the characteristics of sound generated by a snare drum using the coupled mode analysis of the vibrations of the upper membrane and far-field sound with extended proper orthogonal decomposition (POD). Experiments were conducted by employing two players with strikingly different degrees of proficiency to ensure that the impact of the beating technique on the sound generated could be captured. While one player had more than seven years of experience, the other had hardly any experience. Analysis of the results revealed that the first mode of the vibrational acceleration of the membrane caused the most intense sound for both players. However, the sound corresponding to the first mode decayed relatively faster in the case of the experienced player because, unlike the inexperienced one, he did not beat the drum very close to its center, and his beating was relatively quicker. It was also found that the striking stick and the snare-wire play important roles in emphasizing and complicating the vibrational mode of the membrane for sound generation, respectively.