C. dozens of cabinets the size of toaster ovens whir quietly on countertops.

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Everywhere I go, there are once-shuttered factories just waiting to whir back to life in burgeoning industries.

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In a somber laboratory humming with the soft whir of computers and diagnostic equipment, Harfouch performs his artistry.

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Given that pedigree, many hear the whir of the infamous revolving door between federal service and the major law firms.

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The continuous pumping means the patient's pulse is replaced by a constant whir - similar to the sound of a washing machine.

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Generators powered by fuel cells quietly whir and produce half the heat of diesel as they combine hydrogen with air to create electricity.

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The craft is all but silent, the whir of its battery-powered thrusters a whisper compared with, say, the noise of a scuba regulator.

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Aside from the whir of his fishing line, the sounds are of rushing water, birds hidden high above in the treetops and the crunch of leaves underfoot.

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Aurally, when you stomp on the gas, you hear something like the rumble of approaching thunder, a deep-earth vibration that gives way to a high-pitched whir of motor and turbo.

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