基于LabVIEW的声波谐振管实验研究

为了更高效地测量声波谐振管的谐振频率,本文基于LabVIEW设计了测量声波谐振管谐振频率的扫频程序,分别得到了两端闭管条件下不同管长的谐振频率,以及首端闭管与尾端闭管条件下的谐振频率.此外,还通过绘制管内驻波波形图对声压波腹发生偏离的假设进行了验证.最后,对谐振管管身小孔开闭对谐振频率的影响进行了探究,发现小孔位置越接近驻波的声压波腹,谐振频率的偏离量越大.

Acoustic resonator experiments based on LabVIEW

In order to measure the resonant frequencies of the acoustic resonance tube more efficiently,a frequency sweep program based on LabVIEW is designed.The resonant frequencies of different tube lengths with the front-end and tail-end closed are obtained respectively.In addition,the hypothesis is also validated that the acoustic antinode deviated by drawing the standing wave pattern in the tube.Finally,the influence of the opening and closing of the holes on the resonant frequency is investigated.It is found that the closer the holes to the antinode of the standing wave,the greater the deviation of the resonant frequency.