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151) A sound mixer is impressed by the new equipment that was just installed in his recording studio. He says that now he will be able to help singers and musicians produce better CDs because he can eliminate unneeded and undesired wavelengths. What term describes the characteristic of sounds waves that the sound mixer is now able to alter? a. Saturation b. Amplitude c. Volleying d. Frequency 152) Which of the following properties of sound is the most similar to the brightness of light? a. Volume b. Timbre c. Pitch d. Purity 153) Which of the following properties of sound would be the most similar to the colour, or hue, of light? a. Volume b. Timbre c. Pitch d. Loudness 154) An alien from outer space was just captured. Scientists take turns examining the creature. At a press conference, one of the scientists reports that the alien can hear frequencies between 10 000 and 30 000 Hz. How does the alien’s ability to detect sound compare to a human being’s ability? a. The alien and humans detect the same frequencies. b. Humans can detect higher frequencies than the alien. c. The alien can detect higher frequencies, but its hearing is not as acute at lower frequencies. d. Humans can detect higher frequencies; however, the alien detects lower frequencies better than humans. 155) Special ring tones on cell phones that can’t be heard by adults exploit the fact that a. younger adults are more sensitive to lower pitch tones than older adults. b. older adults are more sensitive to higher pitch tones than younger adults. c. younger adults are more sensitive to higher pitch tones than older adults. d. older adults are more sensitive to medium pitch tones than younger adults. 156) Sounds that are _______ decibels or greater in loudness cause us pain and can cause harm to our auditory system. a. 95 b. 110 c. 125 d. 145 157) Loudness refers to the ____________ of the sound wave whereas pitch refers to the _____________ of the sound wave. a. frequency; timbre b. amplitude; frequency c. intensity; timbre d. frequency; amplitude 158) The sensory receptors in the ear are found in the a. ear canal. b. eardrum. c. ear cochlea. d. pinna. 159) What is the basic function of the outer ear? a. To protect the hair cells b. To concentrate and funnel sound waves to the eardrum c. To amplify low-intensity sounds to detectable levels d. To filter out high-intensity sound waves that can be harmful 160) The eardrum is also called the a. oval window. b. eardrum. c. tympanic membrane. d. pinna.

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