Decibel measurement, noise detection, decibel measuring instrument, decibel meter, noise measurement, accurate display of noise decibel dB value, fully grasp the noise level of household appliances, air conditioning, refrigerators, and water heaters. One click sharing, historical records, and a rich toolbox, compass, level, flashlight, and more for easy use! App features: 1. Professional decibel detector, high-precision noise detection 2. Real time display of noise trend chart, displaying nois