[HN Gopher] Noise-canceling single-layer woven silk and cotton f...
___________________________________________________________________
Noise-canceling single-layer woven silk and cotton fabric
Author : bookofjoe
Score : 141 points
Date : 2024-11-25 13:00 UTC (10 hours ago)
(HTM) web link (onlinelibrary.wiley.com)
(TXT) w3m dump (onlinelibrary.wiley.com)
| jcims wrote:
| Apologies for the ADHD induced tangent. Has anyone else noticed
| that regular little party balloons seem to have a passive noise
| cancelling effect? If you bring them close to your ear there's a
| zone of 'dead air' when they are maybe an inch away. My theory
| was that there's something in passing through the rubber envelope
| that creates a phase delay or inversion, but it could just all be
| in my head lol.
| jareklupinski wrote:
| im curious about replicating this
| elicash wrote:
| Do you see a difference regardless of helium or air? I assume
| from your description that it has to be inflated to work.
| bithive123 wrote:
| Helium is apparently great for soundproofing:
| https://www.youtube.com/watch?v=jxOzpPJbnTI (a great
| demonstration of sound suppressing properties of helium)
|
| I am a light sleeper and would love to use it somehow in my
| bedroom, but keeping it contained is tricky.
| tasty_freeze wrote:
| It seems like the effect would be very frequency specific.
| tastyfreeze wrote:
| Having filled a room with balloons, this is very noticeable. It
| also make heating the room difficult.
| roflmaostc wrote:
| heating difficult? Why would that be?
| tasty_freeze wrote:
| Holy cow, I read your comment and thought, "Wait, I didn't
| write that!" Nice to meet you, doppleganger.
| benplumley wrote:
| Could it be an interaction between static electricity from the
| balloon and tiny elements in the ear?
| codazoda wrote:
| My wife makes balloon arches and I've never noticed but this
| sounds fascinating. Maybe I'll get her to work, for "science".
| :P
|
| Note: Her balloons are not typically helium filled, so the
| other users question about air/helium might make a difference.
| Tade0 wrote:
| The latex from which the balloon is made is a decent
| soundproofing material, so what you're hearing is likely just
| that.
| LikelyClueless wrote:
| it maybe acting as an acoustic lens.
|
| https://www.youtube.com/watch?v=RLBmWF9Xo10
|
| edit: Steve Mould's video "I Made a Lens, But for Sound"
| demonstrates how balloons filled with gasses of different
| density than the surrounding air, act as a lens on sound waves.
| Helium filled balloons will scatter sound because the helium is
| less dense than air. He shows how a balloon filled with carbon
| dioxide can focus the sound.
| 0xbadcafebee wrote:
| Somebody wrote a paper on it in 2008:
| https://physics.byu.edu/docs/publication/644
| A balloon filled with a gas that has a different sound speed
| than that of air has been used as an acoustic lens. One
| purpose of the lens is to show refraction of sound waves in
| an analogy to geometric optics. We discuss the physics
| of the balloon lens demonstration. To determine the
| validity of a gas-filled balloon as a classroom demonstration
| of an acoustic lens and to understand the corresponding
| phenomena, its physics is considered analytically,
| numerically, and experimentally. Our results show that
| although a geometric analogy is a good first-order
| approximation, scattering theory is required to fully
| understand the observed phenomena. Thus this
| demonstration can be adapted to a wide range of students,
| from those learning the basic principles of refraction
| to advanced students studying scattering
|
| Here's Harvard demonstrating it too: https://sciencedemonstra
| tions.fas.harvard.edu/presentations/...
| hammock wrote:
| So would a wall of helium balloons work as a sound
| dampener? Or perhaps diffuser? A lot cheaper than
| fiberboard & foam
| ParacelsusOfEgg wrote:
| I doubt it would be cheaper than foam, but this is
| similar to gas filled windows. Argon or Krypton gas is
| pumped in-between the window panes to provide another
| layer of insulation.
| hammock wrote:
| Makes sense
| kurthr wrote:
| At the old Exploratorium in the Palace of Fine Arts there was
| an exhibit that had a large 3-4m balloon filled with
| something heavy (Argon or maybe SF6?) and two points on the
| floor at the foci of the balloon. You could whisper at one
| focus and hear it easily at the other. I think it has been
| replaced with a more durable pair of concrete parabolic
| reflectors with similar effects.
| Brian_K_White wrote:
| Do other smooth surface spherical objects have the same effect?
|
| Sound reflects off smooth surfaces. The ballon is probably just
| acting like any simple physical obstruction, because the
| surface does a lot all by itself even if theres almost no
| substance.
|
| The air inside the ballon is also at a different density than
| outside, without helium, because of the elastic tension in the
| rubber. The air inside is always slightly compressed vs
| outside. I have no idea how much the two densities must differ
| to make the accoustic lense effect. I din't think it's this,
| just everyone seemed to be overlooking that even plain air will
| also have a different density.
| chipsa wrote:
| Density does not affect the speed of sound of a gas.
| Temperature and molar mass does. So increasing the pressure
| of a given composition of gas won't change anything, assuming
| you can bring the temp back down. Helium is obviously a
| different molar mass. But also dry air vs moist air can have
| an effect.
| metalman wrote:
| just the humidity level in the gas used to fill a balloon is
| going to have a significant effect on its properties, human
| breath will have more c02 that air and s higher humidity. Any
| canned pressurised gas, will be pure with zero humidity.
| Heating exchange works through convection cells, the greater
| the number and the smaller they are, the lower covective heat
| transfer will happen, so filling a room with balloons, and you
| have made foam, and at that point the acoustical properties
| must be pronounced fun stuff The activity of silk working as a
| sound absorber is its property of bieng one of(the) best heat
| conductive substances, and as a basic fact, all sound is
| eventualy turned into heat The silk is presumably working to
| convert the mechanicsl motioninduced by sound into heat,
| quickly disapating it and releasing it to the air.
| amarcheschi wrote:
| Definitely
| hinkley wrote:
| Balloon hats for autistic and sensitive people.
| atoav wrote:
| Cool stuff, especially for applications where space is at a
| premium and the adaptability of the material is at a premium.
| circlefavshape wrote:
| _Really_ useful for audio in a small space if this lives up to
| its promise. Absorbing low-frequency sound currently requires a
| lot of space
| atoav wrote:
| Exactly, and I guess there is potential in layering this and
| create way more compact absorbers.
| bogwog wrote:
| > Sound, an omnipresent sensory stimulator, holds significant
| relevance in the human experience, as it continually engages our
| auditory and mental faculties.
|
| This first sentence makes it seem as if the paper was written by
| aliens. Not even deaf people would gain anything from that
| sentence.
|
| I think LLMs have caused me to be more perceptive to and annoyed
| by stuff like this.
| Etheryte wrote:
| Writing like this makes me sigh, exhaling air, the omnipresent
| chemical stimulator, which holds significant relevance in the
| human experience, as it continually engages our biological and
| mental faculties.
| bawolff wrote:
| I think your sentence demonstrates the difference between
| trying to fake "sounding smart" and just writing in a complex
| way.
|
| Like seriously, "[exhaling air] continually engages our [...]
| mental faculties" is pretty nonsensical, since breathing is
| something autonomic. "Omnipresent chemical simulator" seems
| irrelavent in context. All in all, its a nonsense sentence
|
| Now compare with the original sentence. Its an introduction
| to the paper. They are trying to establish why they are doing
| the research they are doing and why you should care. And it
| tells you - we did research into sound dapening because sound
| is all around us and its constantly effecting us. Which is
| something as a human i find to be true - the modern (urban)
| world is quite noisy. When there is too much noise it can be
| mentally exhausting and can tax my ability to understand
| those around me. After reading that sentence I now know why
| they are researching this area, and agree it is a worthy
| thing to research. That introductory sentence did everything
| an introductory sentence to a paper is supposed to do.
|
| Sure, they use some fancy words, but they aren't even that
| fancy. It is a formal paper, i think high school level
| reading ability can be presumed.
| Jackson__ wrote:
| I took it as a play on the common meme of "You are now
| breathing manually." which I did find pretty funny.
| engineer_22 wrote:
| I agree - the motivation provides important context to the
| rest of the research. It helps the reader quickly parse and
| sort.
| PittleyDunkin wrote:
| In this case they could have just said "hearing is
| trivially important to most humans" without any loss of
| value to the paper. The purple prose seems to add nothing
| at all.
| supertofu wrote:
| The opening sentence isn't "complex" or "fancy" writing.
| It's LLM writing.
|
| The paper has: "Sound, an omnipresent sensory stimulator,
| holds significant relevance in the human experience, as it
| continually engages our auditory and mental faculties."
| This is just a sentence stuffed with adjectives. It conveys
| nothing beyond the definition of sound in a bunch of
| adjectives.
|
| Complex (and admittedly annoying) writing would be
| something like: "Ever-cognizable and in continual interplay
| with our auditory faculties, sound is one of the most
| significant objects of human sense perception." This is
| annoying writing for sure, but it's well-constructed,
| unlike the LLM opener for the paper. It culminates with the
| fact that sound is important because it is ubiquitous to
| our perception.
|
| "Fancy" writing would be a little more poetic, something
| like: "As stimulating as it is pervasive, as significant to
| the human experience as it is mundane, sound relentlessly
| occupies our sensory and mental perception: whether
| significant or inconsequential, substantial or
| infinitesimal, sound is all at once the vehicle of our
| heritage, the body of our cognitive terroir, and the symbol
| of our highest arts." This sentence is also annoying, but
| only because it's kind of pretentious. But there is a point
| here: sound is _powerful_ to human beings.
|
| I think the problem with our times is that people cannot
| tell the difference between complex writing, poetic
| writing, and just plain adjective-stuffed LLM writing.
| Which all comes down to the fact that we as a culture have
| devalued complex writing. Complex writing isn't read in
| schools, nor taught at any level of schooling. It's
| actually disencouraged in every Freshman writing class.
| pineaux wrote:
| Although no hat populates my head, I take off my hat to
| you, while jealously cursing your cunning wielding of the
| English language, my good sir.
| bawolff wrote:
| Its low on informational content, but as an introductory
| sentence seems fine to me.
| troyvit wrote:
| Yeah I kinda liked it. It made me stop and listen where I
| was, realizing all the weird noises happening around me that
| I was mentally trying to cancel out.
| marcosdumay wrote:
| It's very motivational. IMO, my answer to it is a sound
| "hell, yeah! can you help with it?"
|
| But the way it's written is bad. The OP would have a point if
| the complaint was about the form, and not the contents.
| Whatever makes people believe they have to write papers this
| way (whether it's true or not) needs fixing.
| PrismCrystal wrote:
| That first sentence has been a totally standard way to open a
| research paper for at least twenty years now. (As I have seen
| from both publishing myself, and as a side gig, doing editing
| of myriad papers by non-native English speakers working in many
| other branches of the sciences.) A writer has to start
| somewhere, and that has always been a matter of social
| convention.
| nyc_data_geek1 wrote:
| How do you do, fellow humans?
| kspacewalk2 wrote:
| My thesis supervisor used excessively flowery language like
| that in papers, and I had to have a few tugs with him over
| needless verbosity all while learning to write a paper for the
| first time. I think there's a subconscious "look at how wise I
| am" whiff that comes off this type of writing. And sure, yes,
| impressive, but let's leave creative writing to creative
| writers. As a scientist, you should instead be focusing on
| communicating a (probably complex enough) idea as clearly and
| as simply as you possibly can - just not any simpler.
|
| By the time I wrote my thesis, I was far more assertive in
| politely declining many of his edits.
| bookofjoe wrote:
| When I was a research fellow in anesthesiology, my supervisor
| constantly made edits that seemed to me unnecessary, almost
| as if he felt it was required of him to demonstrate his
| mastery.
|
| After he changed something I'd revised per his instructions
| back to my original copy I decided I'd had enough: I revised
| only where I thought it improved the papers and ignored the
| rest.
|
| He never said a thing.
| hinkley wrote:
| I wrote an article for an early Java dev website thinking I
| might do that more professionally. I don't know what
| crawled up the editor's butt, but he kept suggesting edits
| that took sentences I sweated over to be precise and
| basically edited them to say either nothing at all or the
| opposite of what I meant. My last round of edits I sent to
| him came with my _own_ comments about why things needed to
| stay worded a certain way, because I thought he was trying
| to make me sound like an idiot - not plain-speaking but
| plain wrong.
|
| It was exhausting and stupid and I stuck to blogging after
| that. Who knows, I might have written books. But not
| dealing with shit like that. I can torture myself much more
| efficiently, TYVM.
| __mharrison__ wrote:
| self-publishing books... just sayin
| hinkley wrote:
| I was always on the fence about whether I had enough to
| say to fill a book. It's more that the experience made me
| stop asking the question.
| Terr_ wrote:
| > my supervisor constantly made edits that seemed to me
| unnecessary, almost as if he felt it was required of him to
| demonstrate his mastery.
|
| There are many stories of savvy workers engaging
| proactively including a flaw in their work being reviewed,
| something small but obvious and easy to fix, so that their
| managers can feel involved. One that often comes up in
| software is an apocryphal "duck" in an unreleased attack
| animation for the queen-unit in Interplay's Battle Chess
| game.
|
| Closely related are the _appearance_ of changes, such as a
| tale that Michelangelo was pressured to "fix" the nose of
| his _David_ statue, so he climbed up and knocked off a
| little bit of material and the superior down below was
| satisfied without being able to verify anything had really
| changed.
| bane wrote:
| My English professors in college beat this kind of stuff out
| of the students. One went so far as to grade all papers that
| started with something like "since time immemorial, man
| has..." with an F.
| RandomThoughts3 wrote:
| The issue here is not so much that it's flowery but that it's
| completely unremarkable, bordering on a truism, in its
| content. The sentence literally means: sound is relevant
| because you constantly hear it.
| abdullahkhalids wrote:
| The sentence is badly written, which is why it feels like a
| truism. But there is content in it.
|
| > Sound, an omnipresent sensory stimulator, ...
|
| Sounds are always being heard by your senses: ears + bass
| that you feel in your body.
|
| > Sound ... continually engages our auditory and mental
| faculties.
|
| The continuous usage of our senses then lets sounds force
| our brains to think in particular ways. This is distinct
| from above - brain vs ears.
|
| > Sound ... holds significant relevance in the human
| experience ...
|
| The continuous engagement results in sound being important
| to what being human means. Note that human experience is
| larger than what you think. So this is also distinct from
| above.
| RandomThoughts3 wrote:
| I'm sorry but you have taken a lot of words to basically
| say: you hear sounds.
|
| Special mention to " Sound ... holds significant
| relevance in the human experience" which is itself a
| truism in the truism. Yes, sound is an experience and
| experiencing is a significant part of being alive. You
| are welcome for this insanely new and deep nugget of
| information.
|
| Honestly, you can remove the first paragraph of the
| introduction with no loss of information involved and end
| up with a better article.
| visarga wrote:
| It is just setting the problem space. It doesn't convey
| anything but a topic.
| trgn wrote:
| Given the obsequious near limitless tolerance we extend to
| operators of loud ICE engines in the public realm, I don't
| think this is nearly stressed enough.
| sephamorr wrote:
| I entirely agree that there is substantial tolerance for
| vehicle noise tolerance and this drives me crazy. Cities
| aren't loud, cars are! I just want to make clear though that
| replacing the ICE part with electric engines solves the
| problem for low speeds only -- once they're going at a
| reasonable speed, engine noise doesn't dominate (if you
| exclude the antisocial behaviors of deliberately loud
| vehicles, most motorbikes).
| the__alchemist wrote:
| Cars aren't loud; commercial vehicles are. (Relatively) So
| are motorcycles, and food truck generators.
| dpe82 wrote:
| The Mustang that parks my street and operates 100% of the
| time in Sport Mode is the loudest vehicle I hear on a
| regular basis.
| surfingdino wrote:
| Some care are loud. Especially those modded exhausts.
| geraldwhen wrote:
| The illegal street racing near me says otherwise.
| creer wrote:
| You can't equate "illegal street racing" to "cars". I
| mean you can but how is that going to address anything?
| blargey wrote:
| Are pickup trucks "commercial vehicles"? Either way
| there's plenty of them in residential areas, revving up
| at 5am or rumbling home in the dead of night.
| Mountain_Skies wrote:
| They really don't need to be, but jerks sometimes do
| modify them to be loud even when idling. About five years
| ago I lived in a neighborhood where some jackass would
| idle his modified truck every morning at a quarter till
| 5am. He'd leave around 5am and you could hear the truck
| for at least a minute as he left the neighborhood and
| started accelerating hard on the highway. His house was
| across the street and four doors down and his truck still
| could be heard through my bedroom window which faced the
| backyard. I don't know how his next door neighbors
| tolerated it. This was an exurban area with lots of
| pickups and even a few commercial vehicles in the
| neighborhood but he was the only one whose vehicle was
| loud and it obviously was made that way intentionally.
| the__alchemist wrote:
| No; they do not have the loud engines I referred to.
| abdullahkhalids wrote:
| If I am walking down the street, listening to something
| on my earphones, I inevitably have to pause/rewind if a
| non-commerical car is passing by.
|
| I could maybe get headphones, or some noise cancelling
| earphones, but I shouldn't have to.
| the__alchemist wrote:
| Valid; I should have clarified. This is a matter of
| degree, not kind.
|
| Commercial vehicles are much louder than cars. Especially
| at the lower speeds where engine noise dominates tire
| noise.
| the__alchemist wrote:
| I will update this: Y'all have valid points regarding
| cars making noise:
|
| Non-modified personal vehicles are significantly less
| loud than commercial vehicles, motorcycles, and food
| truck generators.
| bpfrh wrote:
| To add to that, public transport based on trains is and
| always will be a source of noise, even if they are purely
| electrical
| LargoLasskhyfv wrote:
| That depends entirely on the tracks, and the wheel(sets)
| of the trains, though.
|
| No matter if streetcars/trams downtown, or so called
| 'light-rail'/fast-rapid-mass-transit reaching out into
| the periphery, or neighbouring towns.
|
| They can also be buried by applying that strange concept
| called 'subway'.
|
| Hrrm, what happened to all those hyped loops, btw?
| trgn wrote:
| i'd trade the predictable rumble of a train a couple of
| hours a day over the unpredictable roar and rumble of
| trucks and muscle cars.
| adrianN wrote:
| At low speeds new cars are required to make a sound for
| safety reasons.
| ofalkaed wrote:
| I sometimes miss the constant din of the city, I have heard
| nothing but wind and waves for the past week and those are
| louder than any densely populated area I have lived in. Now
| that they have settled down the crows can hear each other
| so they have been at it all day. When it actually gets
| quiet is when I miss the city the most, I like the quiet
| but every noise breaks that silence which demands your
| attention making it difficult to concentrate on anything.
| It is now below freezing and everything green is gone,
| everything is getting hard and that is when things really
| get loud here, nothing to absorb sound but plenty to
| reflect it. Nature is pretty noisy for the most part, while
| it seems quiet compared to the city it is actually just
| different.
|
| Sometimes when it is _quiet_ here I wonder what the noises
| of nature must have been like to people a century or two or
| three ago when the wind was not just wind but something
| which could destroy your crops and make the next year very
| difficult for you. Or the extended lack of noise constantly
| reminding you that the drought continues and even the
| animals have had the sense to move on while you watch your
| fields slowly die. City or nature our relationship to the
| sounds around us have changed quite a bit, we can now
| choose to ignore the majority of sounds and write them off
| as meaningless or irritating if we can not manage to ignore
| them but those sounds are never meaningless, they all
| signify something more than our irritation.
|
| Right now I am missing the wind and the waves and feeling
| the constant low rumble, I really hate listening to the
| compressor on the fridge but if it stopped making noise I
| would probably be more irritated by the thought of spoiling
| food and the potential inconveniences which that would
| cause. Never could hear my fridge when I lived in the city,
| if it stopped working it would just be an issue to deal
| with when I discovered it was no longer cold, not something
| I had a constant reminder of.
| abdullahkhalids wrote:
| It's interesting that you didn't once mention the sound
| of humans. Background human noise, where you can't catch
| the words, is very nice to hear.
|
| I love the constant din of cities, but the din of people.
| Not the din of cars. If one is lucky enough to live in
| that sort of city.
| fullstop wrote:
| I'm seriously considering moving because I live near an
| interstate. By near, I mean about a mile away, but the trucks
| with the straight pipe exhausts that engine brake drive me
| _bonkers_. On top of those, the sound just carries sometimes.
| I can't see the highway from my house, so it's not a line-of-
| sight thing, just acoustics.
|
| I've started recording the outdoor sound levels using a USB
| sound meter: https://i.imgur.com/IdYdhA8.png
|
| When the quietest it gets is above 55 decibels, I don't like
| being outside. It's not just cars passing by, it is a
| pulsating drone which never ends.
| ffsm8 wrote:
| Cars are extremely noisy, and it's so hard to predict how
| loud any given address is without actually living there for
| a while... Beyond the obvious reasons anyway.
|
| My current address would be perfectly fine if people drove
| according to the rules, but it turns out that people in
| this town don't adhere to speed limits whatsoever and there
| is literally no police control.
|
| Consequently, the 50km/h speed limit is ignored entirely
| with most cars driving around 70km/h.
|
| That shit gets loud!
| fullstop wrote:
| In my case the area has become a haven for warehouses,
| and large (18-wheel) truck traffic is up 90% in the last
| few years alone. I've lived here for over 20 years, and
| it's hard to see it change like this.
| trgn wrote:
| I have the same problem. The difference on a snowday e.g.
| is night and day. no speeders, so much more quiet.
|
| Two of my neighbors on our block bought electrical cars,
| and not exaggerating, it made such a difference to
| quality of life, no longer hearing them pull up or drive
| off.
|
| I lived in a "walkable city" for a number of years. The
| noise outside my window was all human. Footsteps, people
| talking, ... At night was dead quiet. Much more quiet
| than the suburban street I'm on now.
|
| City life is not inherently shitty, it's tolerance for
| antisocial behaviors that make it shitty. I really think
| americans can't always put their finger on it, and end up
| moving out at some point, thinking it has to do with the
| overall "busyness" of city life or something. But it
| really is just noisy cars.
| Joeri wrote:
| I moved from the city to the beach a little over a year
| ago, and though the sound of the waves is roughly the same
| level as the city's car drone was, it being a natural sound
| made a huge difference in my sleep quality and overall
| comfort.
|
| It makes me wonder if the noise profile that cars make
| could be modified to be less annoying, even if not
| necessarily less loud.
| fullstop wrote:
| I would love to hear the crash of the ocean 24x7. The
| highway noise bothers me because of the echoing nature of
| it. It's not uni-directional, and it feels like there's
| always a vehicle coming at me.
|
| My youngest has one more year of high school remaining,
| but maybe it's time to downsize / find a quieter place
| after she graduates.
| OJFord wrote:
| From the way that paragraph continues:
|
| > The importance of sound is underscored by its dual nature,
| serving as both a vital tool for communication and a potential
| source of harm, exemplified by the pervasive issue of noise
| pollution.[1] Considered to be a public health issue by the
| World Health Organization, unwanted noise can have harmful
| health effects on people who are chronically exposed to
| it.[1-5] In the US alone, an estimated 145 million people are
| exposed to hazardous noise levels.[5] To suppress noise levels,
| both active and passive solutions are used.
|
| I suspect it may be angling to funding or a journal/conference
| purpose or something? Without that, the rest of the paper's not
| really going to care about noise pollution, even if it
| potentially indirectly offers a way to mitigate it.
| eyegor wrote:
| For papers sometimes you need to hit a page count to make your
| sponsor/advisor/conference happy. I've been told "this is a
| great paper but can you pad it out to 12pgs?", maybe that
| happened here as well.
| lofaszvanitt wrote:
| It shakes up people, reminding them how shallow their
| vocabulary really is.
| hammock wrote:
| "Sound is everywhere, and fills our ears and minds" doesnt
| quite have the same PhD level ring to it (pun intended)
| piyh wrote:
| I enjoy having an LLM rewrite my shit posts as if it was a
| PhD research paper.
| rrr_oh_man wrote:
| Welcome to academia.
| omegaworks wrote:
| Incredibly important for the comfort and wellbeing of space
| travelers. Imagine being in an enclosed box compacted as
| efficiently as possible next to thrusters and life support
| equipment. The noise must be insane. At the same time, current
| noise suppression materials have to be heavy. Every gram saved is
| worth its weight in gold.
| optimer wrote:
| Talking about noise-cancelling fabric, I recently wondered:
|
| Is it possible to noise-isolate my bed?
|
| I live in a beautiful apartment in my favorite part of the city.
| But the neighbors on some nights are extremely noisy.
|
| If I could noise-isolate my bed, that would be a huge quality of
| life improvement.
|
| I was thinking about putting some noise absorbing material under
| the bed feet and a large noise blocking curtain over it. Like a
| baldachin or canopy bed.
|
| Do you guys think that would work?
| adamweld wrote:
| It's probably not going to be possible to completely silence
| your neighbors, but I'm sure there are a few things you can do
| to make a difference.
|
| If noise is transmitted through the floor, add thick carpet and
| support your bed with a vibration deadening material, e.g.
| something viscoelastic. Sorbothane is popular for this but
| you'll need to spread the load out or pick a high durometer
| (stiff) rubber.
|
| For the walls, hang up some carpets or similar, and/or hang
| heavy material around your bed as a canopy as you suggest. What
| you want is a material that's heavy enough that the energy in
| the sound waves is dissipated trying to move it around. Maybe a
| weighted blanket, or a duvet cover stuffed with mass loaded
| vinyl (used in cars for sound deadening).
| askvictor wrote:
| Some noise dampening could work but probably won't get rid of
| all of the noise. You might want to look at a white-noise
| generator of some sort - I've recently discovered such a
| function on my (smart-but-now-antiquated) clock/radio. I use a
| rain sound but there are plenty of options out there. It does
| wonders for my sleep when there's a party in the neighbourhood
| or the pigeons are partying on my roof.
| mystifyingpoi wrote:
| Get a good quality earplugs, but these real ones, made for
| musicians, not the single-use foam crap.
| coolspot wrote:
| Musicians' ear plugs are designed to let music go through,
| just not dangerous levels of pressure. I am very sensitive to
| sounds and I have tried many earplugs. Foam single-use plugs
| are the best.
| benoliver999 wrote:
| Some companies that make custom ones also make ones for
| sleep
|
| https://acscustom.com/uk/products/other-products/sleep-
| sound
|
| But yeah even they say that for maximum noise cancelling
| you want foam. These are better for comfort.
| ChuckMcM wrote:
| This is a pretty interesting paper. I was not aware of the
| acoustic properties of silk (a fabric that continues to surprise
| me). The ability to actively dampen noise emission would
| obviously be of interest to ninja assassins but as someone who
| has hearing challenges I think exploiting its properties to make
| it into a full garment microphone might be an interesting
| application. Based on the sound levels in the paper I don't think
| it would work as a speaker however which is kind of good because
| everyone having their own mood music all the time would be super
| distracting.
| dsr_ wrote:
| > I don't think it would work as a speaker
|
| https://www.parts-express.com/search?keywords=silk%20tweeter...
|
| begs to disagree with you. (72 results, mostly for sale right
| now)
| ChuckMcM wrote:
| Technicalities! But its a good point. I was thinking
| unsupported fabric as would be found in clothing vs something
| strapped into a frame. A vague neuron in mine brain has faint
| memories of 'silk tweeters' in the Rogers Sound Labs studio
| monitors I used to have, alas 'big' three way speakers are
| much less common now.
| hinkley wrote:
| Bah. I thought this was going to be cool passive noise reduction
| but it's active.
|
| Back in the 90's someone figured out these little hollow beads
| that ate sound. They talked about how we could paint them on
| walls to dampen whole rooms, or things like airplanes.
|
| Since we never heard from them again, even after the patents
| would have expired, I suspect that they couldn't find a binder
| that adhered to the beads without filling in the holes. Or the
| paint neutralizes the effect.
| sgt101 wrote:
| Why wouldn't you just quilt them up in lots of pockets and then
| attach them like wall paper?
| patel011393 wrote:
| This is a repost of an earlier HN post from months ago...
| mensetmanusman wrote:
| Since it's in the zeitgeist, the piezofiber used is a pfas. It
| uses similar pfas materials that all lithium ion batteries
| utilize for safety.
|
| We will have to wrap our heads around which pfas technology is
| worth it.
| unit149 wrote:
| >Finally, the fabric achieves a 75% decrease in sound as its
| vibrations are suppressed up to 95%, and it is controlled to
| modulate acoustic reflectivity.
|
| If an LLM really did write this, I doubt it would be able to
| distinguish between the faculties of Active noise cancellation
| and direct sound suppression.
|
| Within the IoT, SPL has potential blockchain applicability, even
| in an absence of its incorporation in various fabrics. `
___________________________________________________________________
(page generated 2024-11-25 23:01 UTC)