Fristrup and his colleagues set up about 600 sound meter gauges in national parks. Then they used computer models to extend those readings to the entire country. "We find that noise is not ...

Last summer, county staffers presented the commission with their challenge. The only noise meter in the county was broken and, without the meter, accurate and defensible sound levels could not be ...

That system requires a noise meter to test the sound level. The DeKalb County Police Department owns just two of those devices, according to Gregory Padrick, an assistant police chief who made a ...