摘要
设计制作了音频声速测量仪,传输信号是可以连续调节频率的音频信号,发声喇叭和拾音喇叭分别安装在圆管的两端,距离保持不变,拾音喇叭的信号经放大后连接到数字电压表,把发声喇叭的激励信号和拾音喇叭的输出信号都接到示波器上.通过连续改变喇叭的发声频率,利用共振干涉法和相位比较法测量声速.
A apparatus for measuring sound speed was developed .Two loudspeakers were sepa-rately installed at each end of a round pipe .The left one was connected with an audio signal generator . The right one was connected with an audio power amplifier as a pickup .The excitation signal of the left loudspeaker and the output signal of the right loudspeaker were both displayed on oscilloscope . The sound speed was measured with resonance interferometry and phase comparison method by con-tinuously varying the frequency of the sound signal .
出处
《物理实验》
2014年第10期26-28,共3页
Physics Experimentation
关键词
声速
音频
共振干涉
相位比较
sound speed
audio frequency
resonance interferometry
phase comparison
