用Butterworth脉冲测量扬声器的频率频响特性  

Measurement of the Fequency Response of a Loudspeaker Using Butterworth Impulse

作　　者：万芳荣[1] 侯宏[1] 孙亮[1] 董利英[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《测控技术》2009年第3期74-77,共4页Measurement & Control Technology

基　　金：国家自然科学基金资助项目(10674111);西北工业大学研究生种子基金资助项目(200709)

摘　　要：扬声器的频率响应是描述扬声器电声特性的重要参量。脉冲法一次性可以测得较宽频带的频率响应,而且适用于非消声室环境,但脉冲信号质量会影响测量精度。为此,提出了利用Butterworth滤波器响应作为扬声器驱动信号在半消声室和普通房间测量了Hi-WiS6.5R扬声器的频响特性,并和单频测试结果进行了对比,二者吻合良好。The frequency response is an important parameter which describes the electroacoustical characteristic of a loudspeaker. The impulse FFT technique is one of the methods which can be used to measure the loud- speaker responses with broad band in an ordinary room. Actually, the quality of impulse will affect the measure- ment precision. The signal of Butterworth function is used as the driving signal and the frequency response of a Hi-Wi loudspeaker is measured in a semi-anechoic room and an ordinary room. The results agree well with that measured by the single-frequency technique.

关 键 词：频响特性 Butterworth脉冲 扬声器 

分 类 号：TN912.1[电子电信—通信与信息系统] TB95[电子电信—信息与通信工程]