分贝仪APP在共鸣管测声速中的应用

APPlication of Decibel Meter APP in Resonance Tube Sound Velocity Measurement

共鸣管是一种常用的测量声速的仪器,但传统的共鸣管测量声速实验中需要使用耳朵听声音最大时刻,学生做实验时往往会受教室中其他共鸣管发出声音的影响,导致测量结果不准确。分贝仪APP可通过手机麦克风测量声音分贝,对其原理进行分析,探讨其在共鸣管测声速中的应用,通过实验验证其可行性及准确性。实验结果表明,使用分贝仪APP对共鸣管进行测量可得到更为准确的声速值,具有测量方便、操作简单等优点,可在实验教学中推广使用。

The resonance tube is a commonly used instrument for measuring the speed of sound,but in the traditional measurement of the resonance tube,it is necessary to use the ear to listen to the loudest moment of the sound.When students do experiments,the measurement is often influenced by the sound from other groups of resonance tubes in the classroom,which causes the result inaccurate.The decibel meter APP can measure the decibel of the sound through the microphone of the mobile phone.The study analyzes the principle of the decibel meter APP,discusses its application in the measurement of sound velocity by the resonance tube,and verifies its feasibility and accuracy through experiments.The experimental results show that using decibel meter APP to measure the resonance tube can get a more accurate sound velocity value,which has the advantages of convenient measurement and simple operation.So it can be promoted in experiment teaching.