Sound Exploration–Analyzing Ceramic Bell with Computer Phonic Test

• Main Authors: Cheng,Hui-Tzu, 鄭慧慈
• Other Authors: 陳長振
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/29531310531241806866

碩士 === 國立高雄師範大學 === 工業科技教育學系 === 96 === The unearthing of Zeng-Hou-Yi(Marquis Yi of Zeng) peal shocked China and attracted eyes of the world. It led people to admire the intelligence of ancient people and their techniques. The purpose of this paper is to simplify the complicate bronze row belles casting procedure into easier to make ceramic bells. In this research, they based on the ratios of different parts of the bells as recorded in Kaugongji, a volume of an ancient book, Chou-Li. In this Paper, pursuer also describe the design and making method of molds for ceramic bell. In the design of chime stone and chime bell, pursuer also referred to geometric progression, or the “3-Part Adjustment Method”. In this experiment program, the independent variables are the thickness of bell wall and the size / shape, and the dependent variables are the tone (frequency), and the ingredient of clay, moisture content, sintering temperature, shape and decorations. In the research, the sound emitted after knocking on sintered ceramic bells was recorded with computer phonic testing software. The sound was then determined of its pitches (frequency) with spectrum analyzer. Finally, SPSS Statistical Application Software was employed for analysis. After empirical study, the following conclusions are drawn from the results of the study: 1.The tone (pitch) of emitting from the knock gets higher along with the increase of thickness of ceramic bell; the pitch drops along with the increase in bell size. 2.When two or more bells are in same size and shape, the pitch increases along with the thickness of wall of bell. 3.When the thicknesses of wall of bell are same, the pitch goes lower when the size is growing larger. 4.When the size and shape of bells are same, the pitch of the sound emitted goes higher when the thickness of wall of bell is increased. This is not consistent with the statement “The larger the size of vibrating object, the low the tone” given in “ Study of Sound” in the curriculum of Natural and Living Technology of Elementary School. But this is recorded in the ancient books already.