Sound Meter is in the 4th set of the Smart Tools collection. Have you ever suffered from the noise of the neighbors? SPL(sound pressure level) meter app uses your embedded microphone to measure noise volume in decibels(db), and shows a reference. REMEMBER! Most smartphone microphones are aligned to human voice (300-3400Hz, 40-60dB).
Joliet, Illinois. Joliet is a vibrant city in Will and Kendall Counties in the U.S. state of Illinois, located 40 miles southwest of Chicago. It became the county seat of Will County in 1836. With a diverse population of 148,000, Joliet offers a family friendly atmosphere and a thriving business community.
Will County is located in the northern part of Illinois and is one of the fastest growing counties in the United States. The county seat of Will County is Joliet. Founded in 1836, today Will County is a major hub for roads, rail and natural gas pipelines. The County Offices are open from 8:30 a.m. to 4:30 p.m.