基于DSP的1/3oct滤波器在声级计中的设计与实现  

Design and Implementation of One-third Octave Filter Based on DSP for Sound Level Meter

作　　者：沈秋霞[1] 姚青[1] 樊冬毅[1] 王忠明 胡洁[1] 

机构地区：[1]浙江理工大学信息电子学院,浙江杭州310018 [2]嘉兴恒升电子有限责任公司,浙江嘉兴3140331

出　　处：《电声技术》2008年第7期33-35,共3页Audio Engineering

摘　　要：提出了基于DSP的无限冲激响应(IIR)数字滤波器方案。利用MATLAB软件对滤波器进行优化设计与改进;以TMS320C5509为数据处理芯片,CCS(代码编译器)为软件开发平台构建滤波器工程实现高精度的实时频谱分析;实验结果表明,其各项性能指标均达到国标规定的0级滤波器要求,在新型数字声级计应用中具有较强的实用价值。The 1/3 octave IIR（Infinite Impulse Response） digital filter based on DSP is designed to achieve high- precision real-time spectrum analysis. Firstly, MATLAB software is used to optimize design and improvement of 1/3 octave filters, then the filter program is built based on TMS320C5509 for data processing chip and CCS（Code Compiler Studio） for software development platfoIm. Finally, experimental results show that the perfoImance of the filters achieves GB 0 filter index and has strong practical value in the new digital sound level meter.

关 键 词：声级计 1/3 oct滤波器 数字信号处理 MATLAB软件 

分 类 号：TB535[理学—物理]