Some people crave whispers. As a way to relax before going to sleep, these whisper connoisseurs go to YouTube, type in four letters, and let their brain be transfixed by the murmurs of intimacy...
Unfortunately, the science behind ultrasonic pest repellers is ultra-shaky. Seems like an attractive idea though, right? Just plug a charger-sized device emitting undetectable sound into the wall,...
Despite what movies would have you think, rats barely ever聽make any sounds, at least those that humans are able to hear. Rat鈥檚 vocalizations start at around 2 kHz and extend as far up as 100 kHz....
The precious noise-cancelling headphones that every seasoned traveller carries in their bags are actually quite an incredible piece of technology. These headphones work by listening via microphone...
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