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Frequency and amplitude of sound waves

6th grade (Year 7 in England) · 16 questions · Common Core: NGSS.MS-PS4-1 · England: KS3 Physics: Waves (sound)

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  1. Question 1

    A guitar string vibrates 200 times in 2 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  2. Question 2

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 5 kHz?

    • A. yes
    • B. no, it is ultrasound

  3. Question 3

    Why does the upper limit of hearing often fall as people get older?

    • A. Older people make higher sounds
    • B. The ear canal gets wider
    • C. Sensitive cells in the inner ear are gradually damaged
    • D. Sound gets slower

  4. Question 4

    A guitar string vibrates 800 times in 4 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  5. Question 5

    A dog whistle produces sound at 2 kHz. What is this frequency in Hz? (1 kHz = 1000 Hz)

    AnswerHz

  6. Question 6

    Two sound waves are shown on an oscilloscope. Wave B has taller peaks than wave A but the same spacing. How does B sound?

    • A. louder, with the same pitch
    • B. lower pitched
    • C. quieter
    • D. higher pitched

  7. Question 7

    A guitar string vibrates 600 times in 3 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  8. Question 8

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 50 kHz?

    • A. yes
    • B. no, it is ultrasound

  9. Question 9

    Why does the upper limit of hearing often fall as people get older?

    • A. Sound gets slower
    • B. Older people make higher sounds
    • C. Sensitive cells in the inner ear are gradually damaged
    • D. The ear canal gets wider

  10. Question 10

    A guitar string vibrates 100 times in 2 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  11. Question 11

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 40 kHz?

    • A. yes
    • B. no, it is ultrasound

  12. Question 12

    Two sound waves are shown on an oscilloscope. Wave B has taller peaks than wave A but the same spacing. How does B sound?

    • A. higher pitched
    • B. quieter
    • C. lower pitched
    • D. louder, with the same pitch

  13. Question 13

    A guitar string vibrates 150 times in 3 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  14. Question 14

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 2 kHz?

    • A. yes
    • B. no, it is ultrasound

  15. Question 15

    On an oscilloscope, wave C has more waves squeezed into the same width as wave A. How does C sound?

    • A. louder only
    • B. higher pitched
    • C. lower pitched
    • D. silent

  16. Question 16

    A guitar string vibrates 1000 times in 5 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

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  1. 100 Hz
  2. yes
  3. Sensitive cells in the inner ear are gradually damaged
  4. 200 Hz
  5. 2000 Hz
  6. louder, with the same pitch
  7. 200 Hz
  8. no, it is ultrasound
  9. Sensitive cells in the inner ear are gradually damaged
  10. 50 Hz
  11. no, it is ultrasound
  12. louder, with the same pitch
  13. 50 Hz
  14. yes
  15. higher pitched
  16. 200 Hz