- 1. What is the fundamental frequency of my voice in this picture?
A) 4000
B) 300
C) 4500
D) 450
- 2. Which track has a higher pitched (frequency) sound - Track 1 (on top) or Track 2 (on bottom)
A) They are the same
B) Track 1 (top)
C) Track 2 (bottom)
- 3. Tuning fork C has a frequency of 512 Hz and tuning for A has a frequency of 341. Tuning fork C is short and tuning fork A is long. Using this information, tell me about why men tend to have deeper voices than women.
A) Men have shorter vocal chords because they have lower voices
B) Men have longer vocal chords because they have higher voices
C) Women have shorter vocal cords because they have higher voices
D) Women have longer vocal chords because they have higher voices
- 4. Why do sound studios have padded walls?
A) To protect people from hurting each other
B) Sound studios never have padded walls
C) To insulate the walls against sound leaks
D) To make the room look better
A) Finding where you are with a GPS system
B) Finding out where you are based on sound waves that bounce off other objects
C) Listening to pings on a phone
D) Talking through a can with a string attached to another can
- 6. What is the range of human hearing?
A) 50-16,000 Hz
B) 500-2000 Hz
C) 300-3000 Hz
D) 20-20,000 Hz
- 7. What is the range of the human voice on average based on the samples we did in class?
A) 20-20,000 Hz
B) 100-5000 Hz
C) 20-17,000 Hz
D) 200-3000 Hz
- 8. You listen to music at about 70 decibels for a half hour. Is this likely to cause permanent damage to your hearing?
A) No
B) Yes
- 9. Which tuning fork will have a higher pitched sound?
A) 312 Hz
B) 356 Hz
C) 256 Hz
D) 512 Hz
- 10. If Mr. Mansour was talking to you in a normal voice, what might you expect his decibel level to be at?
A) 60
B) 30
C) 80
D) 100
E) 5 dB
- 11. If I adjusted the amplitude of my voice, what would change?
A) frequency
B) volume
C) pitch
D) wavelength
- 12. You do a hearing experiment on a 6 year old boy, a 35 year old man, and a 65 year old man. Tell the results with a range of Hz (example: 100-200) that you would likely get for each person. Type it in as 6 year old = (______ - _______), 30 year old = (______ - _______), 65 year old = (______ - _______)
- 13. Tell why sound travels faster in most solids than in gases.
- 14. Describe why there is no sound in space.
- 15. The dominant frequency of this picture is around 550Hz. There are also spikes around 1100Hz, 1650Hz, and 2200Hz. What are these called?
A) Decibels
B) Harmonics
C) Amplitude
D) Interference
- 16. Sam whispers a secret to Louis. What approximate decibel level is his voice probably at while he whispers?
A) 100 dB
B) 60 dB
C) 1 dB
D) 90dB
E) 30 dB
- 17. Bill is looking through his mother's attic when he finds a box of whistles. He tests out one of the whistles and it lets out a very high pitched sound. Later, he plays the whistle for his mother, age 41. Bill can hear it, but his mother cannot. What is the most likely frequency range of the whistle?
A) 17,000 - 20,000 Hz
B) 200 - 900 Hz
C) 6000 - 8,000 Hz
D) 3000 - 6000 Hz
- 18. If you were stuck in an underground tunnel with no light (another situation that will appear in Saw 27), which skill would be the most valuable?
A) Subtronic valuation
B) Dyslexia
C) Echolocation
D) Ultrasonic hearing (ability to hear over 20,000 Hz)
E) Fibromyalgia
- 19. The movie Saw 27 will come out in 2020. In the movie, Jennifer, Christine, Denzel, and Vicki are trapped in an abandoned train tunnel hundreds of feet underground. The police can hear them banging on the metal rails and shouting up at them. Which do they hear first (the banging or the shouting)? TELL WHY.
- 20. Sheila says she can sing a note higher than anyone in the class. What do you think might be the frequency of that note?
A) 87 Hz
B) 2987 Hz
C) 387 Hz
D) 987 Hz
E) 12,987 Hz
- 21. A group of children are singing in a concert. What might you expect their average frequency range to be at?
A) 200 Hz
B) 950 Hz
C) 1500 Hz
D) 525 Hz
- 22. Which part of the ear helps convert vibrations into electrical signals that get sent to your brain?
A) Eardrum
B) Cochlea
C) Ear Bones
D) Outer Ear
E) Maclear
- 23. You are giving a hearing test to another 14 year old? He hears tones at 300 Hz; 800 Hz; 12,000 Hz; 19,000 Hz. He is not able to hear tones at 10 Hz; 21,000 Hz; and 25,000 Hz. What would you tell him about the his hearing level?
A) Normal range
B) Below the normal range (he can't hear everything he should)
C) Above the normal range (he can hear more than an average person his age)
- 24. Donnie and Jim are sound editors for a global television network and are editing the World Cup. The fans are blowing vuvuzelas (plastic trumpets) very loudly and it is difficult to hear the announcers. In audacity they decide to cancel out all the frequencies except those common to the human voice. Which frequencies should you keep?
A) 2000 - 4000
B) 0 - 200
C) 400 - 1800
D) 5000 - 10,000
- 25. Planes taking off can reach up to 130 decibels. Being around this for too long (without other protections) is likely to cause hearing loss.
A) False
B) True
- 26. In the movie Star Wars, the Death Star (a giant mechanical planet) explodes in outer space with a loud boooooom that nearly shakes the seats in a theater. Explain why a loud explosion like this would not be possible in space.
- 27. If I started singing at 400 Hz and then started singing at 700 Hz, I would have done this.
A) Raised the wavelength of my voice
B) Raised the volume of my voice
C) Raised the pitch of my voice
D) Raised my amplitude of my voice
- 28. Which track has a higher frequency?
A) They are the same
B) Track 1 is higher
C) Track 2 is higher
- 29. Which track has a higher amplitude?
A) Track A (top) is higher
B) They are the same
C) Track B (lower) is higher
- 30. You've given a hearing test to a teacher in your new high school. The teacher can hear all frequencies from 20Hz to 16500Hz. What age would you estimate the teacher to be (based on the tests that we saw in class)?
A) 55
B) 31
C) 62
D) 23
- 31. The following graph shows how fast sound travels through certain materials. It is measured in meters per second. The faster the sound, the higher the number. Which of the following would be accurate labels for the graph?
A) A (orange)=Gas, B (pink) = Solid, C (blue) = Liquids
B) A (orange)=Solids, B (pink) = Gas, C (blue) = Liquids
C) A (orange)=Liquid, B (pink) = Solid, C (blue) = Gas
D) A (orange)=Solids, B (pink) = Liquid, C (blue) = Gas
- 32. Look at the graph. Based on the results, tell what you can conclude. 1. Discuss any differences between the average and the median. 2. Tell what you think the range of the voice is 3. Why is the data so different from singer to singer.
- 33. Based on the picture, which vowel sound would you say has the highest frequency (hint - only compare the lowest frequencies)
A) "OO" as in pool
B) "Ah" as in father
C) "EE" as in heed
- 34. Six people test the resonant frequency of a glass. They record the following numbers: 452Hz, 750Hz, 1152Hz, 449Hz, 1208Hz, 568Hz. What would you recommend they do if they wanted to break the glass with a tone played through a speaker?
A) Play a 575Hz tone
B) Retest the frequency of the glass many times
C) Play a 452Hz tone
D) Play a 750 Hz tone (the average of all the numbers)
E) Play all of the six frequencies at the same time
- 35. These are some of the highest quality headphones you can buy and cost about $1000. Look at the materials and pay close attention to the wood and the foam pads. Why would these materials be helpful in headphones (think back to our experiment).
- 36. If you had a ring tone that played at 2,000 Hz, what age groups would most likely hear it?
A) 0-50
B) 0-40
C) All age groups
D) 0-20
E) 0-30
- 37. What is the range of vocal frequencies for these classic rockers? Describe some of the variations (tell how they are different) in the data.
- 38. Based on our lab, what is the difference between singing voices (Hz levels) and speaking voices?
- 39. This is a graph of two singers, singing the exact same word with the exact same rhythm. Look at the graph and identify the following. 1) Which graph, A or B, is the female? 2) Why do you think the graph you selected is the female - give specific data? 3) Look at the graphs and the harmonics. These two singers are singing in tune. How does the graph show this?
- 40. Philosophy bonus question: If a dog blows a human whistle and the human comes running to respond to it, is the human behavior any different than the dogs? Explain with specific reasons to back up your point. A good answer is worth 2 bonus points.
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