The first property is that sound travels and when it dissipates the sound gets quieter. Mr Wong proved this by bouncing a ball. A computer that was in the other side of the classroom recorded less noise than the computer near Mr Wong.
The second property is that sound travels around corners by bouncing off walls. Mr Wong proved this by clapping behind a wall and the sound was still able to be recorded on the noise meter.
The last property is that sound can travel in every direction, but it never makes the same decibels sound can never be the exact same volume.
LI. To observe the properties of sound.
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