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.
Madison was incorporated as a village in 1846, with a population of 626. When Wisconsin became a state in 1848, Madison remained the capital, and the following year it became the site of the University of Wisconsin (now University of WisconsinâMadison). The Milwaukee & Mississippi Railroad (a predecessor of the Milwaukee Road) connected to Madison in 1854.