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Sound Fundamentals

Sound Fundamentals. Homework and Review Questions. Question #1. The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 27°C. Question #2.

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Sound Fundamentals

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  1. Sound Fundamentals Homework and Review Questions

  2. Question #1 The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 27°C

  3. Question #2 A group of hikers hear an echo 3.00 s after they shout. If the temperature is 22°C, how far away is the mountain?

  4. Question #3 A sound of a pin dropping achieves an intensity of 10dB. The sound of a violin played at a concert is 70dB. The sound of a commercial jet taking off the runway measures about 150dB. How many times louder than the pin drop is the violin? How many times louder is the airplane?

  5. Question #4 A noisy machine in a factory produces a decibel rating of 80 dB. How many identical machines could you add to the factory without exceeding the 90 dB limit?

  6. Question #5 • In north America, one of the hottest outdoor temperatures ever recorded is 57°C and one of the coldest is -67°C. What is the difference in the speed of sound at those temperatures?

  7. Question #6 • How does pressure relate to sound waves?

  8. Question #7 • How do the sound waves in air get translated into electricity?

  9. Question #8 • What does pitch mean? • What is the range of audible sounds for the average human?

  10. Question #9 • Explain why you can hear people speaking around the corner of an open doorway but not see them

  11. Question #10 • The Speed of sound in air is about 340 m/s. What is the wavelength of a sound wave with a frequency of 275 Hz?

  12. Question #11 Identify 2 factors that may affect the speed of sound.

  13. Question #12 Explain why sound travels faster in water than air

  14. Question #13 Distinguish between infrasound and ultrasound

  15. Question #14 Determine which of the following must change when the pitch gets higher: • Amplitude • Frequency • Wavelength • Speed • Intensity

  16. Question #15 Question #5, Determine which of the following must change when the sound gets louder • Amplitude • Frequency • Wavelength • Pitch • Speed

  17. Question #16 Why are sonograms made with ultrasound waves instead of audible sound waves?

  18. Question #17 • Janet is standing 58.2 m from Ninovan. If Ninovan shouts, how long will it take Janet to hear her? Uses 343 m/s for the speed of sound?

  19. Question #18 Determine the average decibel level that describes the loudness of each sound shown below B WHISPERING CVacuum A TALKING E Airplane takeoff DLawn Mowers

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