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A comment on How Restaurants Got So Loud. Parent comment

Re:How Restaurants Got So Loud by 8note on Wednesday November 28, 2018 @03:50PM (#18555546)
won't that depend on how well synced the waves are? if you get the wrong phase, you're doubling the amplitude
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Re:How Restaurants Got So Loud by jlokier on Wednesday November 28, 2018 @04:54PM (#18556037)
If you get the wrong phase, you can hear it - it's louder.

So, if it's quieter, you're ok.

If the device makes the outside world louder, then yes, you might want to turn it off. (This actually happens on my headphones when taking a call.)

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