Why Does Your Phone Have a Tiny Hole? (It's Not a Reset Button)

By Simple Things - Surprising Histories

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The tiny hole on your smartphone plays a critical role in modern communication. In this video, we explain what it actually does and how active noise cancellation works step by step using real science and verified acoustic engineering principles. The Tiny Hole in Your Phone Explained: What It Is and How It Works | Simple Things Surprising Histories This documentary style episode from Simple Things Surprising Histories covers the fascinating science and history behind your phone's secondary microphones, from 1950s military aviation technology to modern pocket-sized noise cancellation. Topics covered in this video: • What the tiny hole on the top and bottom of your phone actually is • Why you should never poke it with a SIM card ejector tool • Why modern smartphones use multiple microphones • The science of Active Noise Cancellation (ANC) explained • How soundwaves and anti-waves are used to cancel out background noise • The history of noise-canceling technology in military aviation an

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