Sound Field Simulation And Acoustic Quality Analysis Of Bamboo Flute

Based on the status of the analysis of bamboo flute both in China and abroad,this paper studies the key problems of the vibration and acoustics of bamboo flute through theoretical research,acoustic finite element simulation and experimental means,and reveals the vibration mechanism of the flute and the influence of material parameters on the acoustic quality of the bamboo flute,and explores the change from the objective physical angle.Good and sound quality evaluation method of bamboo flute,and the flute for manufacturing quality improvement and provide scientific guidance.The mechanism of interaction between the cavity and the bamboo flute is very complex,the formation of a complex vibration system.On the basis of analyzing the movement of sound waves in the bamboo flute,the traditional vibration model and the modern vibration theory,this paper puts forward the acoustic finite element model of the bamboo flute.The model takes account of the coupling effect between the vibration of the bamboo flute and the sound and vibration of the bamboo flute itself,which reflects the pronunciation process of the bamboo flute.In order to further study the vibration mechanism of flute,an acoustic measurement system is designed and constructed by using acoustic finite element technology.By the experimental technology of bamboo flute pronunciation in-depth experimental study.By measuring the sound field at different frequencies of the flute,the quality of the sound produced by the play of the bamboo flute is studied and verified,and the experimental support for the establishment of the acoustic finite element model of the bamboo flute is provided.In the frequency response of the bamboo flute used in the experiment,the pitch accuracy in the frequency range of 1-2k Hz has great influence on the dynamic frequency response and acoustic quality of the bamboo flute.In this paper,the acoustic finite element model of bamboo flute is determined through theoretical study,and then the effect of frequency response range and frequency domain characteristics on the acoustic quality of the whole bamboo flute is analyzed by the acoustic finite element simulation.In order to verify the theoretical and acoustic finite element simulation results,we designed an experimental device based on LMS to measure the spectral characteristics of each pitch during playing.It provides measurement more accurate and practical in the experimental device for experimental study of acoustic quality real bamboo flute.Experimental results verify the results of acoustic finite element simulation.The vibration state is the bamboo flute and play an important role for the acoustic quality of the bamboo flute.This paper analyzes the frequency response of bamboo flute through geometric modeling and acoustic finite element simulation,and explores the influence of material parameters of bamboo flute on the vibration characteristics of bamboo flute.At the end of this paper,the vibration of bamboo flute was analyzed by MATLAB software,and the influence of the change of material on the acoustic quality of bamboo flute was analyzed through the analysis of the results of the sound measurement of bamboo flute and the results of acoustic finite element simulation.Put forward the methods and ways to improve the acoustic quality of the bamboo flute.From the point of view of theoretical significance and practical application,this paper introduces the history and present situation of bamboo flute research,studies the pronunciation mechanism of bamboo flute from the point of fluid mechanics,aims to reveal the relationship between the theoretical pronunciation mechanism of bamboo flute and the effect of actual pronunciation,and explores the methods of evaluating the acoustic quality of bamboo flute from a practical point of view.