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# Can You Hear Me Now? (page 2)

based on 218 ratings
Author: Andrew S.

### Terms and Concepts for Background Research

Sound waves were researched to see if pressure affects the frequency of sound. Barometric pressure was researched in partner with sound waves. Sound was also a big topic and was researched to see how it behaved in different temperatures. Finally, we researched about parabolic sound collecting dishes and how they worked.

### Research Questions

• Does heat affect the frequency of sound?
• Does atmospheric pressure affect the frequency of sound?
• Does distance affect how sound is collected?
• How does the frequency of sound behave in different weather conditions?
• How does a parabolic dish work?
Experimental Procedure
1. Assemble the parabolic sound collecting dish (see appendix a).
2. Set the oven to 0oF with room temperature at 70°F.
3. Place the parabolic sound collecting dish 197 cm away from the oven.
4. Surround all sides of the dish except for the side facing the oven with poster boards so the unwanted sound is kept out.
5. Pl ay one long single “middle C” tone at 440 Hz on the tuner metronome for 15 seconds facing the oven and record the measurement on the IPod on the other side of the poster board.
6. Record the sound in hertz.
7. Repeat this 5 times, label each trial 1, 2, 3, 4, and 5.
8. Repeat steps 2-7 four more times at 225, 325, 425, and 450°F.
9. Repeat steps 2-8, except at 394 cm.

### Results

 room temperature 70°F Temperature of Oven at 0°F     (Group #1) Sound waves in Hertz(Hz) at 197 cm Sound waves in Hertz(Hz) at 394 cm Trial 1 2448 1464 Trial 2 1880 1666 Trial 3 1350 1495 Trial 4 1998 1498 Trial 5 1455 1529 Average 1826.2 1530.4

 room temperature 70°F Temperature of Oven at 225°F     (Group #2) Sound waves in Hertz(Hz) at 197 cm Sound waves in Hertz(Hz) at 394 Cm Trial 1 4479 1995 Trial 2 2373 1899 Trial 3 3292 1579 Trial 4 3598 1772 Trial 5 2119 1660 Average 3172.2 1781
 room temperature 70°F Temperature of Oven at 325°F    (Group #3) Sound waves in Hertz(Hz) at 197 cm Sound waves in Hertz(Hz) at 394 Cm Trial 1 3467 1961 Trial 2 3862 2367 Trial 3 4911 2498 Trial 4 3174 2893 Trial 5 3627 2311 Average 3808.2 2406

 room temperature 70°F Temperature of Oven at 425°F    (Group #4) Sound waves in Hertz(Hz) at 197 cm Sound waves in Hertz(Hz) at 394 Cm Trial 1 4144 2505 Trial 2 5719 2806 Trial 3 4603 2712 Trial 4 5097 2538 Trial 5 4465 2612 Average 4805.6 2634.6
 room temperature 70°F Temperature of Oven at 450°F     (Group #5) Sound waves in Hertz(Hz) at 197 cm Sound waves in Hertz(Hz) at 394 Cm Trial 1 4466 2917 Trial 2 4510 3243 Trial 3 4591 2887 Trial 4 4874 2779 Trial 5 4774 2612 Average 4643 2887.6

The average is 1826.2 Hz. The outlier is trial one because it is 621.8 Hz higher than the average. There is no trend. The range of the data is 1098 Hz.

The average is 3172.2 Hz. The outlier is trial one because it is 1306.8 Hz above the average. There is no trend. The range of the data is 2360 Hz.

The average is 3808.2 Hz. The outlier is trial three; it was 1102.8 Hz higher than the average. There is no trend. The range of the data is 1737 Hz.

The average for the data is 4805.6 Hz. There was no outlier; they are all close to the average. There is no trend. The range of the data is 1575 Hz.

The average of the data is 4643.0 Hz. There was no outlier; they were all close to the average. There is an upward trend and at trial 5 the trend starts to drop. The range of the data is 4808 Hz.

The average of all the trials is 3651 Hz. The outlier was trial one because it is 1824.8 Hz lower than the average. There is an upward trend that slopes down at 450°F. The range of the averages is 2979.4 Hz.

The average is 1530.4 Hz. There was no outlier; they were all very close together. There is no trend, and the range is 202 Hz.

The average is 1781 Hz. There is no outlier, they all were very close to eachother.There was no trend, and the range was 416 Hz.

The average is 2406 Hz. The outlier was trial four, it is 487 Hz below the average, and there is no trend. The range is 932 Hz.

The average is 2634.6 Hz. The outlier is trial 2, because it is the farthest from the average. It is 171.4 Hz above the average. There seems to be no trend, The range is 301 Hz.

The average is 2887.6 Hz. The outlier is trial 2 because it is 355.4 Hz above the average. There is no trend, and the range of the data is 631 Hz.

The average of the averages is 2247.92 Hz. The outlier is trial one, because it is 717.52 Hz.There is an upward trend going from 0°F to 450°F. the range of the averages is 1357.2 Hz.