Properties of Sound

PROPERTY: a characteristic that something is known by. For example, a property of ripe strawberries is that their colour is red.

OBSERVE: to watch and remember what happened.

EXPERIMENT: to observe what happens to something when different conditions are imposed on it.

CONDITION: a state of being.

IMPOSE: to make someone or something do something.

HYPOTHESIS: a prediction or evidence based guess that can be tested to find the truth.

What properties of sound can you figure out? There will be a bunch you can figure out by just experimenting with sound. Watch the video to find out how to do the experiment.

Fill out this table with your observations and hypotheses about the properties of sound.

You will need to use a sound meter like this free online meter by Youlean.

Observation I think...	Evidence	Hypothesis ✅ ❎
The results changes depending on how far or close you are from the source		Sound is louder when it's near the source and quieter when its far away.
Sound was recorded around a corner from the source	The sound meter moved up as Mr Wong clapped from around the corner	Sound can travel around corners
Mr Wong recorded sound at the same distance but different directions. The sounds were basically the same loudness.	The sound source was 1 meter away from the recorder in all directions. The sound source was placed in front, behind, to the left, right and above. The sound levels were all around 93 dB.	Sound can travel in all directions
Mr Wong bounced a ball near his meter. The meter recorded a louder sound, but the far meter recorded a quiet sound.	Mr Wong’s meter recorded 80 dB, but the far meter recorded 59 dB.	Sound dissipates as it travels.