These “soundfield” systems, usually about $1,000 a classroom, provide a smoother, louder sound with little reverberation and no feedback.

We used a professional sound meter to measure the din of daily life and talked to scientists about the health risks it can pose. A looping video of a suburban neighborhood curbside on a cloudy day ...

Update, 7.23.22: This post has been modified to include more accurate information about classroom noise studies dating back to the 1970s and the noise-abatement device developed by a UK-based company.

Fremont, CA – AVer Information Inc. USA, the award-winning provider of video collaboration and education technology solutions today announced the launch of the A30, the world’s first All-in-One Camera ...