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Showing posts with the label air

Allowing free flow of air while simultaneously blocking/ absorbing >86% of sound across frequency spectrum from 300 to 6000 Hz

https://techxplore.com/news/2026-02-physics-principle-absorption-barriers-ventilated.html "sound-absorbing foam/ fiber solid/ porous blocks ventilation, overcome with destructive interference balancing structure's monopole/ dipole resonances... traps sound waves, causing dissipation into heat... Figure of Merit evaluates absorption bandwidth/ material thickness/ air channel openness relationship... jet engine roar reduction while maintaining intake/ exhaust efficiency, silent fans/ heat sinks for computers/ servers, noise barriers for highways/ tunnels allowing natural wind passage/ preventing heat buildup"

Personalized ventilation redirects airflow around person while continuously drawing contaminated particles into a localized purification zone

https://www.eurekalert.org/news-releases/1106948 "shields user from disease as they move around room with device in hand, without any often uncomfortable air jets... induction-removal (jet-sink) airflow concept... during 30-minute consultation prevents any pathogen inhalation for 1st 15 minutes of exposure... during 2nd 15 minutes 9.5% probability of infection compared to 91% under standard ventilation without device... removes up to 94% of airborne pathogens... medical clinics, classrooms, offices... future: refine the design for larger rooms"