# 3D Printing Acoustic Filters | Two Minute Papers #109 ## Метаданные - **Канал:** Two Minute Papers - **YouTube:** https://www.youtube.com/watch?v=7JbN9vXxGYE - **Дата:** 27.11.2016 - **Длительность:** 5:03 - **Просмотры:** 63,424 ## Описание The paper "Acoustic Voxels: Computational Optimization of Modular Acoustic Filters" is available here: http://www.cs.columbia.edu/cg/lego/ WE WOULD LIKE TO THANK OUR GENEROUS PATREON SUPPORTERS WHO MAKE TWO MINUTE PAPERS POSSIBLE: Sunil Kim, Julian Josephs, Daniel John Benton, Dave Rushton-Smith, Benjamin Kang. https://www.patreon.com/TwoMinutePapers Subscribe if you would like to see more of these! - http://www.youtube.com/subscription_center?add_user=keeroyz Music: Dat Groove by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://audionautix.com/ Splash screen/thumbnail design: Felícia Fehér - http://felicia.hu Károly Zsolnai-Fehér's links: Facebook → https://www.facebook.com/TwoMinutePapers/ Twitter → https://twitter.com/karoly_zsolnai Web → https://cg.tuwien.ac.at/~zsolnai/ ## Содержание ### [0:00](https://www.youtube.com/watch?v=7JbN9vXxGYE) Intro dear fellow Scholars this is 2minute papers with Caro what is an acoustic filter well it is an arbitrarily shaped object that takes a sound as an input and outputs a different sound these filters have some ### [0:14](https://www.youtube.com/watch?v=7JbN9vXxGYE&t=14s) different boundaries really amazing applications that you'll hear about in a minute in this work a novel technique is proposed to automatically design such filters it works by building an arbitrarily shaped object as a set of connected tiny resonators and chooses appropriate sizes and setups for each of these elements to satisfy a prescribed set of acoustic properties instead of resorting to a lengthy and flimsy trial and error phase we can use physics to simulate what would happen if we were to use a given arrangement in reality again one of those works that have a deep connection to the real world around us absolutely amazing the goal can be to eliminate the peaks of the sound of a car horn or an airplane engine and we can achieve this objective by means of optimization the proposed applications we can divide into three main categories the first is identifying and filtering noise attenuation components for a prescribed application to which we can also refer to as Muffler design in simpler words we are interested in filtering or muffling the peaks of a known signal designing such objects is typically up to trial and error and in this case it is even ### [1:29](https://www.youtube.com/watch?v=7JbN9vXxGYE&t=89s) engine noise filter harder because we are interested in a wider variety of shape choices other than exhaust pipes and tubes that are typically used in the industry with this unoptimized Muffler The Three Peaks are not suppressed now we replace the muffler with an optimized one The Three Peaks are more suppressed ### [2:06](https://www.youtube.com/watch?v=7JbN9vXxGYE&t=126s) acoustic earmuffs another application for Muffler designs acoustic ear muffs we made adapters that allow for switching between acoustic filters the first pair of ear muffs is optimized to reduce engine crank noise we can see the Three Peaks are now suppressed to a lower sound level second ### [2:29](https://www.youtube.com/watch?v=7JbN9vXxGYE&t=149s) instrument prototyping designing music instruments is hard and unless we design them around achieving a given acoustic response we'll likely end up with inharmonious gibberish and this method also supports designing musical instruments with h well non-conventional shapes well this is as non-conventional as it gets I'm afraid and also that is about the most harmonious sound I've heard coming out of the rear end of a hippo and third this work opens up the ### [3:17](https://www.youtube.com/watch?v=7JbN9vXxGYE&t=197s) acoustic tagging possibility of making Hollow objects that are easy to identify by means of acoustic tagging check out this awesome example that involves smacking these 3D printed Piggies artic filter design also opens up possibilities for a few new applications in this acoustic tagging example we optimize the tapping sound of three piggies the three sets of frequencies and Taps each piggy filter sounds differently so that our iPhone app can detect and identify each of them to go one step further we ### [3:55](https://www.youtube.com/watch?v=7JbN9vXxGYE&t=235s) acoustic encoding demonstrate the ability to encode a bit string pattern making use of the fact that the has both the speaker and microphone the bottom we modulate the input white noise to encode different biit patterns if you feel like improving your kung fu in math there are tons of goodies such as transmission matrices the helm hols equation oh my the pap paper and the talk slides are amazingly well written and yes you should definitely have a look at them let us know in the comment section if you have some ideas for possible applications Beyond these ones we love to read your take on these works thanks for watching and for your generous support and I'll see you next time oh --- *Источник: https://ekstraktznaniy.ru/video/14746*