| 11. | Benny uttered cordially, making the humming sound that is to llamas what barks are to dogs.
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| 12. | If spun correctly it makes a humming sound.
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| 13. | The real answer : Because they flap their wings so fast, it makes a humming sound.
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| 14. | At the firehouse they discover a third firefighter, Tony Diaz, who can hear a strange humming sound.
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| 15. | The humming sound of the tuning fork could be heard when the watch was held to the ear.
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| 16. | It is named the " Hummer " by locals due to a distinct humming sound it makes while feeding.
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| 17. | They detect a strange melodic, humming sound, which soon can be recognized as the song Solty learned from Rose.
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| 18. | "Hear that ? " she said of the humming sound vibrating from her old VCR . " Time to go.
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| 19. | Acoustic telegraphy devices were electromechanical and made musical or buzzing or humming sound waves in air for a few feet.
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| 20. | Along with for-sale signs on front lawns, the venting systems, which emit a humming sound, have become a fact of life.
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