机械科学与技术2012，Vol.31Issue(3)：470-474,479,6.
基于简源声波理论的低频气流调制器发声特性研究
A Research on Sound Generation Characteristics for the Low-frequency Airflow Modulators Based on the Simple Sound Source Theory
董明荣 1陈克安 1许学忠 1阮浩忠1
作者信息
- 1. 西北工业大学航海学院环境工程系,西安710072
- 折叠
摘要
Abstract
The sound generation characteristics for the low-frequency airflow modulators are studied based on the simple sound source theory in this paper.The calculation formulas for three types of airflow modulators,with flexing square hole,rotating square hole and rotating circular hole are deduced,respectively.The sound generation laws for the rotating square hole modulator due to the changes of the duty cycle,gas chamber volume,gas supply pressure and flow rate are calculated based on the simple sound source theory.The simple sound source characteristics of such three modulators are compared.The calculation results show that the distortion of the flexing square hole modulator is the minimum and the highest sound intensity and the minimum distortion can be realized by choosing proper duty cycle.The bigger the gas chamber volume,gas supply pressure and flow rate are,the higher the sound intensity is.but the incremental ratio is decreased and the distortion is augmented at first and then decreased.The comprehensive consideration of these factors is beneficial to the design and optimization of the airflow modulator.关键词
气流调制器/声波发生器/声特性/失真Key words
airflow modulator/sound generator/sound characteristics/distortion分类
机械制造引用本文复制引用
董明荣,陈克安,许学忠,阮浩忠..基于简源声波理论的低频气流调制器发声特性研究[J].机械科学与技术,2012,31(3):470-474,479,6.
