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Hunter5678 Hunter5678
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6 years ago
Sounds with frequencies below the range of human hearing are referred to as
 
  a. fundamental frequencies.
 b. pure tones.
 c. ultrasound.
 d. infrasound.
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xballaxballa
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6 years ago
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Hunter5678 Author
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Brilliant
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Thank you, thank you, thank you!
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Thanks
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