Although Apple's 4.7-inch "iPhone 7" may replace a 3.5mm headphone jack with a second speaker grill, that grill may not actually have a speaker behind it, according to leaked schematics posted on ...
A super-sensitive contact microphone, called the "Insect Microphone", can pick up the footsteps of crawling insects. It was developed to convey on television the reality of the world of small insects.
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