From the experiments, we use two speakers to produce sound by placing a 1.2 m and 1.0 m away and use the sound card in sound level measurement, the distance from the speakers is 1 m and move the sound card every 5 cm leading figures from the sound level meter to calculate using python.From the experimental results found that:1. the use of different frequencies cause different graphs. Cause we all know that the distance between the peak and different.
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