| 11. | The whir of cars zipping overhead on the bridges provided a lulling comfort.
 
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 | 12. | The machines whir, ding, ching and clang.
 
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 | 13. | The whir of engines at full boil picks up.
 
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 | 14. | Morant said over the whir of helicopter rotor blades.
 
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 | 15. | Dealers point to quieter engines that whir rather than buzz like a giant mosquito.
 
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 | 16. | Nail drills whir so fast they can easily penetrate the nail and cut you.
 
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 | 17. | You can't hear voices over the muted whir of a ventilation system.
 
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 | 18. | Their reply this time is a loud whir.
 
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 | 19. | The room is silent, except for the loud whir of the air conditioner.
 
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 | 20. | Memory-retention machines whir in the background.
 
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