anonymous
  • anonymous
2. Select the boy icon. Select the lowest pitch by selecting the bottom music note located to the bottom right of the lab activity. Select the GO button. What happened to the volume of the sound as the sound source moved past the observer? Record your observations.
Physics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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theEric
  • theEric
Hi! It seems like this question is asking you to do something and observe the result. Do you have a question about something that you're not understanding?
anonymous
  • anonymous
yes uhm , What properties of sound determine the pitch of sound? How is this affected by motion of the sound source?
theEric
  • theEric
Okay, that I can help with! First you need to know what sound is. And pitch. "Sound" is really just the compression and stretching out (rarefraction) of a medium. So, with air, some of the air will be pushed tight together (compression), and some of it will be spread out more than normal (rarefraction). Now, these will be caused by something else that is moving the air back and forth. It's like moving your hand through water, sort of. You push and it bunches up in your hand (compression). You pull, and there is dip in the water where not as much water is. The difference is that air is invisible and it can be compressed... The time in between the push and the pull is the "period" of oscillation. Oscillation just means back and forth motion, pretty much. The number of push-pull per second is the frequency. We often think of the frequency as creating the pitch. Our inner ear parts move with the air, at the same frequency, and so that's what our brain says the "pitch" is. :) Next, I'll talk about Dopplar Effect. But you have to know what sound is. So any questions?

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theEric
  • theEric
You are offline. I'll leave you to look up the dopplar effect. YouTube can be VERY helpful!!
theEric
  • theEric
If you want to read my description of the Doppler Effect, my response to a question like that is here. http://openstudy.com/study#/updates/51f5a6c6e4b00daf471c7f00
goformit100
  • goformit100
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