FIR数字滤波器在声音识别系统上的应用  

Application of FIR Digital Filter to Voice Recognition System

作　　者：程芳[1] CHENG Fang(Anqing Vocational and Technical College,Anqing,Anhui 246003,China)

机构地区：[1]安庆职业技术学院,安徽安庆246003

出　　处：《河北北方学院学报（自然科学版）》2021年第3期27-30,共4页Journal of Hebei North University:Natural Science Edition

基　　金：2018年度安徽省高校优秀青年人才支持计划项目(gxyq2018217);2019年高等学校省级质量工程项目(2019jyxm0661)。

摘　　要：目的消除门禁声音识别系统受到的干扰信号,使得门禁系统能正常和准确地为公司员工出入做好服务。方法以某公司大楼为例,根据声音信号的特点,设计出合理的FIR数字滤波器进行滤波去噪。结果比较原始信号与滤除后信号的波形和频谱图,实验表明的确能够有效消除噪声。结论由于声音信号在传输过程中易受到干扰,只要设计出合理的滤波器,则能有效的去除噪声,使得声音识别系统正常运行。Objective To eliminate the interference signal of the access control voice recognition system to make the access control system normally and accurately serve the company’s employees.Methods By taking the company building as an example,a reasonable FIR digital filter was designed according to the characteristics of sound signal.Results Compared with the original signal and filtered signal waveform and spectrum,the experimental method could effectively eliminate noise.Conclusion As the sound signal is easily disturbed in the transmission process,the reasonably designed filter can effectively remove the noise and the sound recognition system can run normally.

关 键 词：声音识别系统 MATLAB FIR数字滤波器 频谱图 

分 类 号：TN912.3[电子电信—通信与信息系统]