＊日本大学生産工学部建築工学科教授＊＊日本大学生産工学部創生デザイン学科専任講師─ 1 ─日本大学生産工学部研究報告A2023年 ６ 月 第 56 巻 第 １ 号Metal percussion instruments such as gongs, temple bells, SOBAN (Japanese Gongs), wind chimes, etc. are widely distributed in East Asia and Southeast Asia. They are mainly made from materials such as bronze, brass (yellow brass), iron, etc., and used for not only signals or time signals in daily living but also for various purposes such as accompaniment music in religious ceremonies and dancing. Unlike Western musical instruments, they often accompany “interference beats” as their main characteristics. However, their acoustic structure has hardly been studied. With acoustic analysis and natural vibration analysis of these metal percussion instruments mainly on their “interference beats,” it is possible to examine objective tone vibrancy and tone color changes that could not have been found from interviewing instrumentalists and instrument makers.In this report, the sound for two kinds of SOBAN in used is analyzed and also that for two kinds of SOBAN of 33cm and 45cm in diameter are manufactured actually is analyzed in detail.As a result of analzing the sound of the three Japanese gongs, which are SOBAN in Kami-ichigao, they are used in the hall of Jizodo and are sometimes used in religious ceremonies, so the two gongs are tuned to the pitch of G and B of twelve equal temperament and the other one is also tuned the pitch of D#. In comparison, the SOBAN in Sode-cho is tuned to the pitches of D and D#. Since the frequency difference between the two is about 5 Hz, it has been clarified that beats occur about 5 times per second.In modern SOBAN production, unless there is an order, two Japanese gongs are not made according to G and B, but the they are tuned approximately a semitone apart. In addition, the SOBAN of Enshu Dai-nenbutsu is not produced with the 'interference beat' in mind from the beginning, and as basically it is difficult to make the thickness of the upper surface of the two gongs the same, this inevitably produces a 'interference beat'. And it is thought that this 'interference beat' was eventully the characteristics of the timbre of the SOBAN in Enshu Dai-nenbutsu.Keywords:SOBAN, Japanese Gong, Interference Beat, Pitch, Frequency Characteristics研究ノートHiroyoshi SHIOKAWA＊ and Kazuto NAKAGAWA＊＊塩川博義＊，中川一人＊＊Study on Sound Characteristics for SOBAN双盤の音響特性に関する研究
元のページ ../index.html#3