基于短时傅里叶变换的扬声器共振频率检测  

Resonance Frequency Detection of Loudspeaker Based on Short-time Fourier Transform

作　　者：郭苏[1] 许增朴[1] 王永强[1] 周聪玲[1] 

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《电声技术》2015年第10期18-20,51,共4页Audio Engineering

摘　　要：通过分析在单一频率正弦信号和连续对数扫频信号下扬声器响应信号频谱的特点,提出在短时傅里叶变换的基础上,对扬声器共振频率进行求解。对扬声器扫频范围内的响应信号进行采集和短时傅里叶变换,并分析各个窗对应谐波分量的大小,进而得出共振频率。该方法能够快速获取扬声器的共振频率,测量结果准确,为扬声器在共振频率附近区域的检测提供保证。The spectrum characteristics of the loudspeaker＇ s response signal under a single frequency sine signal and continuous logarithmic frequency sweep signal are analyzed. The resonance frequency of loudspeaker is solved based on the short time fourier transform. The loudspeaker＇ s response signal under sweeping range are acquired and processed, analyzing the energy in each window size of the harmonic components, and then obtain the resonance frequency. The method can get the resonance frequency of the loudspeaker quickly, and the measurement results are accurate, ensuring the speaker＇ s detection near the resonant frequency.

关 键 词：扬声器 短时傅里叶变换 共振频率 

分 类 号：TP643[自动化与计算机技术—控制理论与控制工程]