this post was submitted on 21 Sep 2023
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Noise-canceling robots to 'mute' loud conversations in cafe | What if we told you that we can actually silence a noisy table right next to us in a café? (interestingengineering.com)
submitted 1 year ago by L4s to c/technology
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Noise-canceling robots to 'mute' loud conversations in cafe | What if we told you that we can actually silence a noisy table right next to us in a café?::undefined

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[–] K3zi4 4 points 1 year ago (1 children)

Yes, sorry, I didn't phrase that well at all. The sound pressure is actually cancelled out, but with the hypothetical example of the jet engine, anything going wrong could double the dB level instead of cancelling, and because we're talking milliseconds difference, it would be quite easy to go wrong in this sense.

[–] [email protected] 5 points 1 year ago (1 children)

It can't double the dBs. It will only add 3 as dBs are a log scale and +/-3dBs is double/half.

[–] K3zi4 1 points 1 year ago

Oops, yes, this. A perceived doubling!