Anechoic chambers are pretty damn awesome. Basically, they're rooms designed to be sound-proofed against outside noise, while, inside, sound is prevented from bouncing off the walls. There's no echo. There's a number of ways you can build this, but one system at the University of Salford in England, is actually a room within a room, with the innermost chamber actually mounted on springs, rather than the floor of the outer room.
Anechoic chambers are often used to test out audio equipment or to get accurate audio measurements on systems that are supposed to operate very quietly.
Minnesota Public Radio recently went inside the room that holds the title for world's quietest—an anechoic chamber at Orfield Laboratories in Minneapolis.
To get into the anechoic chamber, you go through two bank vault-like doors. The floor in the room is mesh like a trampoline so there's nothing on the floor for the sound to bounce off of. The walls are lined with sound-proofing wedges that are a meter long so they absorb the sound.
...A typical quiet room you sleep in at night measures about 30 decibels. A normal conversation is about 60 decibels. This room has been measured at -9 decibels.
Listen to the rest of the story at Minnesota Public Radio's website.
Read about the history of anechoic chambers.
Image: Photo of an anechoic chamber taken at the Kyushu Institute of Design's anechoic chamber by Alexis Glass. Free to use under GDFL.
Roald Dahl spent the last of his days in a special armchair that he modded to help him with back pain from a WWII injury; now, in honour of the Dinner at the Twits interactive theatre events, the craft 40FT Brewery has swabbed some yeast from Dahl’s chair and cultured it to brew Mr. Twit’s […]
A Mars science news update from NASA’s Jet Propulsion Laboratory, in Pasadena, California.
Graduate student Jason Ahrns captured a stunning image of red sprites over Nebraska while aboard a plane chartered by the National Center for Atmospheric Research. And behold Scott McPartland’s rare video of the phenomenon in May.
If you’re looking to earn a top salary in the tech industry, there’s no better career than coding. However, sometimes the hardest part of entering this career path is knowing where to begin.We took the Complete Web Developer Course because it took that decision out of our hands. This course teaches beginner-friendly coding languages that will also help land an immediate […]
To be a Pokémon master, you’ll need a phone that won’t constantly die on you. Because nothing is worse than seeing the screen go black right as you’ve finally found the Charizard of your dreams.That’s why we’re so excited about the LinearFlux PokeCharger Portable Battery ($39.99). With its 3.0 Amp HyperCharging technology, this slim battery will […]
The tech industry is constantly innovating, and in order to stay competitive, you’ll need to keep up. The Programming Into the Future Bundle was created to teach you the skills employers are looking for at this very moment, including in-demand coding languages like Google Go.The bundle of courses includes instruction on a range of innovative tools that advanced coders […]