Sheriff Jack W. Brandes. To serve and protect the citizens of Austin County and the great State of Texas and to preserve and protect the. Constitution of the United States of America, especially the Second Amendment, the Right to Bear Arms..
Integrating Sound Level Meter. In atmospheric sounding and noise pollution, ambient noise level (sometimes called background noise level, reference sound level, or room noise level) is the background sound pressure level at a given location, normally specified as a reference level to study a new intrusive sound source.
Purdue Universityâs Chemistry Department gives you examples of noise sources for each decibel level: 1  50 dB (1/4th as loud as 70 dB) - Quiet conversation at home. 2  60 dB (1/2 as loud as 70 dB, fairly quiet) - Conversation at a restaurant. 3  70 dB (upper 70s are annoyingly loud) - Running a vacuum cleaner.