The average sound level meter tends to have a range that starts at 31.5 Hz and can go up to around 8,000 Hz. Decibel: Decibels are how loud or soft of a sound a sound level meter can detect.

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

Educators can choose from a variety of paid and free noise meter apps to help measure classroom sound levels and keep them in check. The visuals in the apps range from stoplights and bouncing balls to ...

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 ...

“These sound meters will help deter the bad actors, the ones that are not adhering to the ordinances and fail to remember their business is located in a mixed-use community,” she added.