sounds study questions

1. In the lab activity, you will examine sound waves as they are emitted from a moving source. Predict what will happen to the sound waves when the sound source is in motion. Record your prediction (hypothesis) as an “if then” statement. (For example: If you select the GO button, then the train will move)

If the sound source is moving then when the sound gets closer, the volume will increase and when the sound passes by you, the volume will start decreasing.

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. When the sound source moved past the observer the volume decreased.

3. Click your mouse in any area on the page. Select the reset button on the lab activity. Select the boy icon. Select the middle note located in the bottom right of the lab activity. Select the GO button. What happened to the pitch of the sound as the sound source moved past the observer? Record your observations. When the sound source moved past the observer the sound of the pitch lowers.

4. Click your mouse in an area on the page. Select the reset button on the lab activity. Select the boy icon. Select the highest note located in the bottom right of the lab activity. Select the GO button. Describe the volume and pitch of the sound as the sound source moved past the observer? Record your observations. When the sound source moved past the observer the volume increases and then decreases and when the pitch goes higher than to low.

5. Did the experiment prove or disprove your hypothesis? Support your conclusion based on results from the experiment and your knowledge of sound waves. The experiment proved my hypothesis because whenever the sound gets closer to the observer, it increases and whenever it passes him, it decreases. These are sound waves.

6. What properties of sound determine the pitch of sound? How is this affected by motion of the sound source? Be specific. Frequency and Sound waves determine the pitch of the sound. The higher the frequency of a sound wave, the higher the pitch we receive. The lower the frequency of s sound waves, the lower the pitch we receive.

7. What properties of sound determine the volume of sound? Is this affected by the motion of the sound source? Amplitude determines the volume of sound. No, it’s not affected by the motion of the sound source, it affects the pitch.
8. If the pitch of a sound decreases and the sound source is moving, is the sound source moving toward or away from the observer? If the pitch of a sound decreases and the sound of the source is moving, the sound source is moving away from the observer because whenever the volume passes you, it will start decreasing.

9. Describe at least two ways that your understanding of the Doppler Effect could be applied to everyday life. 2 ways I can understand the Doppler Effect could be applied to everyday life, first way is listening to airplane as it passes by you and the second way is when the ambulance siren is passing by you.