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		Clever workaround to silence the iOS camera shutter sound (stackoverflow.com)
		12 points by wppp 21 hours ago \| hide \| past \| favorite \| 3 comments

danhau 16 hours ago | [–]

I believe this is also how active noise cancelling headphones work. Take audio, negate sample amplitude, playback with original at the same time.

1 + -1 = 0 aka. phase cancellation

lofaszvanitt 17 hours ago | | [–]

This is what volvo did in order to cancel out the audible engine noise in their early cars. At least thats what I heard from pitk.

sammyteee 18 hours ago | [–]

Very nice!

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