Echoes create an interior map app

To record size and shape of a room, researchers use a speaker, five microphones and some math

By Andrew Grant, 18:00 PM June 17, 2013

Determining a room’s dimensions no longer requires a tape measure. An algorithm that sorts through echoes to develop accurate maps of a room, detailed June 17 in the Proceedings of the National Academy of Sciences, may lead to better sound quality for teleconferences and online gaming.

Previous experimental setups of acoustic maps have always involved a speaker that emits a sound and multiple microphones that record the sound. Ideally, each microphone detects sound waves that bounce off a s...

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