New Cheaper, Simpler Phonophone Amplifies Your iPhone Without Batteries
images credit Science + Sons Three years ago we showed the original Phonophone , which amplified your iPod without batteries. The science behind it was the same as those old record players with the big horn; Wikipedia explained that “Acoustic horns convert large pressure variations with a small displacement into a low pressure variation with a large displacement.” But the original Phonophone was large and expensive at $875. Now the designers contradict their own motto, “To put a song … Read the full story on TreeHugger
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New Cheaper, Simpler Phonophone Amplifies Your iPhone Without Batteries
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on December 1, 2010. Filed under
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