Measuring sound speed by changing sound frequency in a fixed distance
YE Shu-zhong · Physics Experimentation · 2012
A device for measuring sound speed was designed.Two loudspeakers were installed at the ends of a round pipe,respectively.The left loudspeaker was connected to an audio signal generator.The right loudspeaker was connected to an audio power amplifier as a receiver.The excitation signal that input the left loudspeaker was displayed on an oscilloscope.The output signal of the right loudspeaker was also displayed on the oscilloscope.The sound speed was measured using the phase method by changing the sound frequency.