The partial injury (there are no ventilators for rats, so the researchers could not completely sever the cord without killing them) allowed only one side of the diaphragm to work and the rats had trouble breathing.

ECONOMIST: Neurology

In addition, all feature a specially designed Acoustic Optimizer that ensures dynamic sound and deep rich bass response, with optimum acoustical characteristics achieved by adjusting the sound pressure balance in front of and behind the diaphragm.

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This diaphragm picked up the shaking of the car.

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There's some clever custom technology, such as the dual-electrodes the HE90 have between the diaphragm that is the cornerstone of the push-pull principle, that go a long way to helping these cans use to produce their sound.

ENGADGET

While most venues have those run-of-the-mill mics -- which typically enlarge diaphragm size to increase sensitivity -- David Schwartz thinks he has a better idea for picking up even the slightest peeps without introducing distortion.

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