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COMD 5070 Certification Exam Questions and CORRECT Answers

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As sound travels through air, which of the following changes occur: a. the molecules change their composition b. sound can only be transmitted through solid objects, so no changes occur to the air itself c. the air molecules travel from the speaker to the listener d. changes occur in air pressure - d. changes occur in air pressure The frequency of a sound wave a. is related to the number of vibrations of air molecules that occur each second b. is directly related to how loud we perceive the sound to be c. is greater for higher amplitude sounds d. must be above 10,000 Hz in order to be heard by humans - a. is related to the number of vibrations of air molecules that occur each second

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