Above 20,000 Hz, she says, an alarm ”starts sounding not really urgent, but like a squeak.”
Maybe that should be 2,000 Hz? Above 20,000 and it sounds like every dog in town barking.
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Above 20,000 Hz, she says, an alarm ”starts sounding not really urgent, but like a squeak.”
Maybe that should be 2,000 Hz? Above 20,000 and it sounds like every dog in town barking.
