How does it actually work?Sound doesn't travel in a vacuum and the higher the density the faster the speed of sound. Yet somehow insulation is done with with high density materials?And foam somehow doesn't worl even though you'd expect it to disperse and cancel out the energy?How do you actually do the sound insulation properly??Plz explain
>>3014432>Yet somehow insulation is done with with high density materials?Because heavier things attenuate and absorb sound better than lighter things.>And foam somehow doesn't worl even though you'd expect it to disperse and cancel out the energy?Foam is just trapped air. It's good at reducing reverb, and can help isolate surfaces from each other by damping them. But it doesn't itself directly absorb vibrations because it has low mass.Sound insulation effectiveness and requirements depend on the frequency range you're trying to prevent transmission of, and the intensity gradient you are trying to achieve between the source and your shielded location.
>>3014432It's done with 'high density' soft materials. The same is true for machine bases, they use cast iron instead of steel because cast iron has pockets of graphite that absorb vibrations while steel would ring like a mother fucker.And foam works, wtf are you talking about? Speaker cabinets are stuffed with foam, it has to be the soft kind though, not rigid foam.
>>3014432Without an actual vacuum your best bet is to take as much energy out of the vibration as you can. You do this by making it do work against a material. You want a material that resists movement, doesn't spring back after being deformed and is loosely packed so it's not coupled to the rest of the material. Density gives you the first one and you can get around the last two with more density if you can get enough of it. The other angle is reflecting it back, and you get a bit of this every time you change mediums.Foams can suck if they're rigid because they're really tightly coupled so the vibration just gets transmitted through the structure. Metal sucks because the crystal structure makes it springy as fuck and extremely coupled. Concrete is good because it does all of the above.
>>3014432>How does it actually work?by not having neighbors op. as long as you live away from people you won't need to invest in technologies to suppress their dirty waves. you can also do what i do and listen at night.
>>3014432>Yet somehow insulation is done with with high density materials?sound waves contain energy which wants to shake other things.Dense material requires more energy to shake them so it can absorb a lot of energy before it gets noticeableOne good way is to have something heavy that absorbs the sound but has no solid connection to other things where the vibrations cant travel through.>another examplepicrel is basically a heavy hockey puck bolted to an exhaust with a rubber bushing at the bolt. The vibrations are used up by it and dont transfer to the car.
