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Jay Rose posted a topic in General DiscussionFrom today's New York Times: Scientists are trying to make long-term recordings of the ambience in remote Alaskan locations, to capture the sounds of birds and bears and other creatures before they're drowned out by snowmobiles and flyovers. Except sometimes the critters act like actors looking for an excuse why they can't concentrate:
http://www.neomatica.com/2014/08/27/designed-metasurface-thin-near-perfect-acoustic-absorber/ Maybe some of y'all saw this one already. But some scientists at Hong Kong University have created a type of sound absorption technology that relies on a metasurface suspended over a pocket of gas and a small weighted platelet that can be tuned to dampen a particular frequency nearly 100%. It also generates a small amount of energy. The down side is each membrane can only be tuned to absorb one frequency. But there is interesting potential Tl;dr Smart people have made super sound blankets
martyg posted a topic in Currenthttp://medicalxpress...ted-mammal.html I have mild tinnitus, looks interesting