Comment on Students’ Leaf Blower Suppressor To Hit Retail

• MentalEdge@sopuli.xyz ⁨1⁩ ⁨month⁩ ago

  Why? dB is logarithmic so it’s difficult for people to picture how loud something is, if that’s the only number given.

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  • wewbull@feddit.uk ⁨1⁩ ⁨month⁩ ago

    And so are our ears. That’s why we use db. So 12db is not perceived by us to be 94% quieter.

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    • webghost0101@sopuli.xyz ⁨1⁩ ⁨month⁩ ago

      So its 94% less sound because this seems sound calculated -12db in % with conventional formulas?

      How would we describe perceived sound exactly, not many people can imagine something when given a db value? Maybe we should?

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      • Natanael@slrpnk.net ⁨1⁩ ⁨month⁩ ago

        When loudness is described there’s often lists with examples of things with their typical loudness specified in dB, so you can compare against things you may have heard.

        See the image chart here

        decibelpro.app/…/decibel-chart-of-common-sound-so…

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• A_A@lemmy.world ⁨1⁩ ⁨month⁩ ago

  Well, 93.75% to be more exact. Did you recalculate it yourself ?

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  • SchmidtGenetics@lemmy.world ⁨1⁩ ⁨month⁩ ago

    The team reduced the overall leaf blower noise by about two decibels, making the machine sound 37% quieter.

    You omitted the most important data, it’s 2db overall, not 12db.

    So your own “recalculation” isn’t even in the right ballpark as the correct answer.

    Its people that misinterpret the information and perpetuate it like you are doing here that makes these look far better than they actually are.

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  • NeoNachtwaechter@lemmy.world ⁨1⁩ ⁨month⁩ ago

    The perception of noise is quite complicated. But as a rule of thumb: when some noise changes by -10dB, then you hear it about “half as loud”.

    Source: I have a university degree in acoustics.

    So for the reduction of -12dB here, it will be perceived as “nearly half as loud”. Very different than the “94%” is suggesting.

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    • SchmidtGenetics@lemmy.world ⁨1⁩ ⁨month⁩ ago

      It’s also only 2db overall, the one frequency they dropped that much.

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    • A_A@lemmy.world ⁨1⁩ ⁨month⁩ ago

      We agree that the -12dB is what’s important for human hearing … Now, you may agree that the 94% reduction is what counts regarding engineering // fabrication // design.

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      • SchmidtGenetics@lemmy.world ⁨1⁩ ⁨month⁩ ago

        We agree that the -12dB is what’s important for human hearing … Now, you may agree that the 94% reduction is what counts regarding engineering // fabrication // design.

        -2db* and 37%*

        Why are you perpetuating the wrong information?

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