• partial_accumen@lemmy.world
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    6 months ago

    Dyson gets shit on frequently for being overpriced, but the audible analysis they do one some of their products is crazy complex. Some years ago I watched 30 minute video on the design they did for the hair dryer where they were designing minute angles in the fins of the air impeller, and using a PWM algorithm to measure backpressure in a feed back loop to spin up the fan where it wouldn’t create loud noise while also increasing the volume of air moved. They tuned the mechanisms specifically to shave off tiny peaks in oscilloscope readings.

    One thing I remember is that they said they couldn’t entirely eliminate the specific annoying sound frequencies because it had to ramp, but what they did is ramp to right below the annoying sound frequency level, then hold, then burst above the annoying frequency band very quickly. So the operator of the unit doesn’t hear the annoying sound because the device shoots past it so fast.

    I’ve never heard of any company be that picky and put so much effort into avoiding one negative experience of a product.

    • callouscomic@lemm.ee
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      6 months ago

      And then they go and make an idiotic bathroom hand air dryer that is vertical and unnatural to dip hands into and too small of an opening so as to be difficult to not touch it with your clean hands.

      • partial_accumen@lemmy.world
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        6 months ago

        They released that original Airblade hand drying 18 years ago in 2006 way before the hair dryer.

        11 years ago In 2013 they released the Airblade V which doesn’t do the vertical dip thing.

        • callouscomic@lemm.ee
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          6 months ago

          Well, I see the old one 99 times more often than the new one.

          I’m talking about this piece of crap design.

      • Flipper@feddit.de
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        6 months ago

        Maybe I’ve got small hands, but I’ve never had problems with them. I slightly cup my hands. At least it feels like they get dryer faster that way.

      • whereisk@lemmy.world
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        6 months ago

        Haven’t these been shown to be literally the proverbial shit hitting the fan in terms of spreading bacterial matter everywhere?

        • pr06lefs@lemmy.ml
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          6 months ago

          Yes they literally pull in particles from the bathroom air and blow them directly on your hands.

          • whereisk@lemmy.world
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            6 months ago

            Plus a good chunk of people only wash hands for show: the water runs for 1 sec it barely touches their fingertips, then go on to these dryers and whatever is on their hands flies out everywhere.

      • purplemonkeymad@programming.dev
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        6 months ago

        Maybe it was just me but I never had issues with the u shaped dryers. Although I normally put my hands in by the side, wrists above, kept them flat, and drew out slowly. Dry hands every time.

        Other dryers just end up pushing water to the dry side of your hand.

    • PerogiBoi@lemmy.ca
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      6 months ago

      Wait until you find out the analysis they do on car door closing sounds and the clickiness of specific buttons! Industrial Design is COOOL.

      • Cypher@lemmy.world
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        6 months ago

        Buying industrial buttons and modding old controllers isn’t really mainstream but damn it should be.

        A NES controller with switches and joysticks normally used in a combine harvester is really satisfying.

        • PerogiBoi@lemmy.ca
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          6 months ago

          Haha no that’s not what I meant. Industrial Design is a profession and automotive industrial designers design all sorts of things, from the shape of the body to the swoopiness of a headlight to the specific clacky feel of various buttons.

    • ammonium@lemmy.world
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      6 months ago

      I have to run out of the bathroom when my wife uses her Dyson hair dryer because it hurts my ears, and you’re telling me this is by design?!

    • CptEnder@lemmy.world
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      6 months ago

      They also really really work well, theyre over engineered like crazy but last forever.

    • KillingTimeItself@lemmy.dbzer0.com
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      6 months ago

      this is pretty cool but it’d be cooler if the started supporting right to repair. As far as i can care they’re cunts until they stop producing manufactured e-waste products.

    • CoriolisSTORM88@lemmy.world
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      6 months ago

      Not necessarily for sound, on industrial fans and drives, we can program in skip frequencies to avoid any resonance issues in the system. I’ve never done it for noise reduction. But I do some tweaks for efficiency and power consumption reduction. There’s some wild industrial design stuff out there, and in the end, it’s because it provides something the customer wants. I won’t go into specifics, but you can design the same components the same for multiple manufacturers and do some slightly different things in its construction to give the vibe the OEM wants, or to fix some inherent characteristics in the manufacturers platform. It’s REALLY cool when you think about it. Sorry to be so vague, but I have to be.

  • TheFeatureCreature@lemmy.world
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    6 months ago

    It’s almost like it’s a requirement for every landscaping company to use the most noisy, ear destroying, gas-powered leaf blower that they can buy that can be heard from 2 city blocks over.

  • Ghostalmedia@lemmy.world
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    6 months ago

    For the people not reading the article. This is not about gas leaf blowers.

    The challenge was to take an electric leaf blower and make it even quieter.

    • ikidd@lemmy.world
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      6 months ago

      I don’t mind the electric ones, but I had a neighbour that would fire up a two-stroke backpack monster at 6 AM any morning there was the barest skiff of snow. And he’d try for hours blowing heavier snow that he could have had shovelled in 15 minutes. He was generally just an asshole neighbour all around.

      • KillingTimeItself@lemmy.dbzer0.com
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        6 months ago

        we had a thread a while ago, and some dude was in there insisting that blowers can be “used for snow” because apparently snow blowers don’t fucking exist.

        People are fucking weird dude.

        • Semi-Hemi-Lemmygod@lemmy.world
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          6 months ago

          I’ve used one for a very light coating or powdery snow, but more than a couple inches of that it’s just easier and faster with a shovel

          • KillingTimeItself@lemmy.dbzer0.com
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            6 months ago

            IMO if it’s that little snow, i’m just fucking leaving it.

            It’s not gonna kill me, unless it’s sitting on a solar array or something.

            • Semi-Hemi-Lemmygod@lemmy.world
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              6 months ago

              I live in a place where if someone slips on your sidewalk they can sue, so I’m a little more cautious about it.

              Assuming we get snow ever again…

                • Semi-Hemi-Lemmygod@lemmy.world
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                  6 months ago

                  For injuries related to slipping and falling. It’s a real thing, and why a lot of places nearby don’t even have sidewalks to avoid this liability

  • Spaceballstheusername@lemmy.world
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    6 months ago

    The sad thing is the students who actually did the work will probably see no financial gain from this. Students pay to take a class and then a company pays the university for access to the students and the students ideas and work is used by a company with no financial benefit to the students. Everyone makes out except the students.

      • Spaceballstheusername@lemmy.world
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        6 months ago

        I worked at a UC and companies retained all IP across all UCs and my undergrad school from the east coast was the same way. I’ve never heard of a university that let students keep their IP. I would imagine it would be hard to attract outside companies since the companies pay to be a part of the program. Can you point to a university program that allows students to retain their IP for senior design projects? I know if a student is doing a project through the school for a different class like a lab and they invent something or are volunteering the university has no claim to it but senior design is different.

          • Spaceballstheusername@lemmy.world
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            6 months ago

            So it looks like for senior design classes the students don’t have to be associated with projects where they lose their IP rights. But sponsors have the right to say a project will give all IP to the sponsor. I imagine how this works in practice is all external companies will require they retain IP then the professor creates additional projects where ip can be retained but these are usually canned projects solving some trivial problem that won’t really allow the students to go anywhere interesting with the project. I am not saying that’s the case but I remember at my undergrad and at the UC school that was the case.

      • Spaceballstheusername@lemmy.world
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        6 months ago

        There are graduate students unions or research assistant unions. Undergraduates (not ones working in a lab) don’t work for the university they are customers. It would be like members of a gym unionizing. I guess it could happen maybe.

  • astrsk@kbin.social
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    6 months ago

    Too bad these innovations wont make it down to the workers that stores hire from 11pm to 3am to clean the store parking lot across from me.

    • Nora@lemmy.ml
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      6 months ago

      Good thing is you could 3d print some and give them to them. If they use a compatible blower that is. Or if you’re handy with modeling you could probably modify the attachment part.

      • explodicle@sh.itjust.works
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        6 months ago

        (10 hours of work later)

        “Ok how much money will this save me for the risk of your plastic thing melting all over my blower.”

  • twig@lemmy.dbzer0.com
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    6 months ago

    Fuck leaf blowers. I don’t care if they’re quieter. The term here is “polishing a turd.” They don’t really solve any problems. They’re not good at removing debris, but just blowing it to a place where someone else will deal with it.

    Also… removing debris on its own is a dubious pursuit, since “debris” could also be termed “stuff that holds moisture longer and slows the effect of drying soil during drought conditions.”

    • Kcs8v6@lemmy.world
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      6 months ago

      The majority of use my leaf blower gets I blowing grass clippings from the street back into my lawn. It keeps cyclists safe and doesn’t make a mess on public travel ways. I think for that purpose they are a great solution.

    • SoleInvictus
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      6 months ago

      The gasoline powered blowers are also one of the worst polluting motors in common use.

      • Ozone6363@lemmy.world
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        6 months ago

        I want you to think about how many leaf blowers are actually being used, and how many hours even the most inefficient small engine would have to run to compare to a single semi-truck route.

        It’s so incredibly fucked how you people miss the forest for the trees.

        • twig@lemmy.dbzer0.com
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          6 months ago

          So I promise I’m not trying to be a dick here. While what you’re saying is essentially reasonable, it’s actually not true.

          The amount of emissions in these small, wildly inefficient engines is considerably worse than even a large pickup truck. The reason is because emissions standards, including the introduction of catalytic converters, etc. don’t apply to lawn equipment. The result is that these don’t actually burn fuel correctly, and spew out lots of harmful pollutants in a way that even large ICE vehicles don’t.

          https://www.edmunds.com/car-reviews/features/emissions-test-car-vs-truck-vs-leaf-blower.html#:~:text=Distilling the above results%2C the,than the crew cab pickup.

          https://grist.org/technology/lawn-equipment-pollution-report/

          Like sure, there are larger sources of emissions, but I’m kinda in favor of making changes that would offer a large benefit proportionate to the amount of lifestyle change needed to make the switch. As in, making this switch would be easier than not. These emissions produce no benefit to us, and they cost us a weird amount of money to produce.

          • Ozone6363@lemmy.world
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            6 months ago

            So I promise I’m not trying to be a dick, but do you actually understand the results from the articles you posted?

            A basic mass balance on the claims implies a very narrow interpretation of “emissions”. It doesn’t even pass the most basic sniff test, come on.

            Not only do those articles completely ignore CO2, what about the energy required to manufacture and transport the fuel in the first place?

            Those studies focus on NOx emissions, a very small subset of overall environmental impact. They basically cherry pick the fuck out of what consitutes as an “emission”, and ignores the massive difference in greenhouse gasses produced.

            There are claims that running a leaf blower for 30 minutes produces as much “emissions” as driving a Raptor like 1 thousand miles.

            Lmao, if you think a quarter gallon of gas from the leaf blower is “worse” than 100 gallons of fuel the truck would burn, you have to be mad.

            Think about it for more than a couple seconds.

            And even funnier about this, the solution for this shit is already here. Aside from commercial landscaping companies, electric is already taking over. Its basically a non-issue as far as realists are concerned.

        • SoleInvictus
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          6 months ago

          Do you have any solid information to provide or are you just making vague allusions toward some unsubstantiated assumptions so you can justify to yourself being a judgmental ass?

          It’s so incredibly fucked how “you people” are judgmental shits who are busy jerking yourself off every time you can “well ackshally” someone.

        • StupidBrotherInLaw@lemmy.world
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          6 months ago

          This is an alert from the Summer’s Eve Emergency Broadcast System. This is not a test. I repeat, this is not a test.

          Reddit has experienced a Level Spez douche release which impacted Lemmy.world approximately 96 hours ago. Lemmy users may observe increased douche activity, including but not limited to: unjustified smugness, irrelevant and erroreous corrections, bad arguments, ego fragility, unwarranted hostility, and assorted douchebaggery. Users are advised to remain calm, refrain from engaging encountered douches in serious conversation, and to liberally use the block feature.

    • blubfisch@discuss.tchncs.de
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      6 months ago

      I actually see street cleaning teams here in Germany regularly where one person blows the dirt out from bike racks and from under parked cars and the other person sits in the big street sweeper to pick up the dirt. I think this is a very valid use for blowers. The blowers are electric, but I sure would.not mind them a bit more quiet.

  • HBK@lemmy.dbzer0.com
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    6 months ago

    …is this not just a muffler/silencer for leaf blowers? Good on these kids! This definitely falls under the ‘why didn’t I think of that!’ category for me.

    • KillingTimeItself@lemmy.dbzer0.com
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      6 months ago

      it’s electric.

      Which means it’s automatically 200x quieter than a two stroke.

      Idk what else they did but im pretty sure it makes almost no difference lmao.

        • KillingTimeItself@lemmy.dbzer0.com
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          6 months ago

          correct me if im wrong here, but gas leaf blowers are inherently many times louder than electric leaf blowers to begin with. Calculating the near field DB levels doesn’t really count here since most of the annoyance is actually going to be from other people who have to listen to it running.

          And since electric leaf blowers often have a much higher pitch, that pitch attenuates at a much greater rate, especially compared to that of an ICE meaning that it’s often silent, if not very quiet, at the same distance that an ICE would be rather loud at.

          Also, in my defense 90% of articles these days are not worth reading, i’m sure they probably did something as i literally mentioned in my previous comment, but like i said, comparing this to a traditional ICE leaf blower (which people seem to fucking love for some reason) in comparison i’m still pretty confident that this would make almost zero fucking difference, since the vast majority of noise coming from an ICE blower is not air noise, but engine noise.

          But yes thank you for telling me that i’m wrong and bad for not reading an article about an item that has probably 20-30% market share from my anecdotal experience.

          • locuester@lemmy.zip
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            6 months ago

            And since electric leaf blowers often have a much higher pitch, that pitch attenuates at a much greater rate

            As the article states, it’s this sound that they got rid of. A 94% drop in the high pitched shrill of the electric leaf blower.

            Read. The. Article.

            It’s a 2 minute read ffs.

            • KillingTimeItself@lemmy.dbzer0.com
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              6 months ago

              i am aptly aware of this, in fact i’m aware of the fact that it’s actually a 12db drop in volume. Someone else kindly told me what was in the article.

              But my primary point is still true.

              and in defense of myself, most articles are bullshit anyway. 50% of it is filler, and 20% of it is useless information, edu sites are generally better, but there’s no guarantee, and i don’t bother with most articles these days. And my problem here isn’t even the fact that they did drop the volume of the noise, my problem is that i’m not sure this is a significant accomplishment.

              There are a lot of fields actively researching this exact same concept.

              • locuester@lemmy.zip
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                6 months ago

                So you’re not here to read articles ever? You’re just here to get corrected in comments?

                • KillingTimeItself@lemmy.dbzer0.com
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                  6 months ago

                  i’m not here to read articles most of the time, because people talk about what’s in the article here. And in this case, leaf blowers, specifically electric ones are a bit quieter in near field operations.

                  Which i definitely expected, based off of the headline, but like i said, compared to a traditional ICE leaf blower, especially commercial backpack setups. Does it make a difference? Uhm. Not sure.

                  It’s funny to me that people yell at me about not reading articles, even though i understand the general pretense of it, without reading it. People literally corrected me by stating numbers, because that was the only thing i didn’t mention, since i didn’t read the article. And i didn’t even come here to speak about it, i mostly came here to complain about the fact that small ICE engines exist on lawn equipment.

          • squidspinachfootball@lemm.ee
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            6 months ago

            I’m completely uneducated in this field, but there’s a 2 min video attached to that page that demonstrates before and after. Sure sounded better to me ¯\_(ツ)_/¯

            • KillingTimeItself@lemmy.dbzer0.com
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              6 months ago

              i’m not educated in the field specifically, but what i do have a knowledge base of is the fact that this probably isn’t a technical W for the leaf blower industry, especially judging that most commercial leaf blowers are gas ICE based equipment, and that even with the home market being more accessible than ever, a lot of home owners still use ICE based equipment.

              Put together with the fact that the high pitch whine attenuates aggressively at distance, compared to much lower pitches. It’s likely that it has little benefit for anybody other than the user, in which case, hearing protection.

              I’m sure this is a more broad accomplishment, but this has been a field of study across multiple industries for multiple reasons.