Smartphone will measure noise just as accurately as expensive dB meters.If the correct App and microphones are used highly accurate measurements can be taken. In all cases the accuracy of smartphones lies within the margin of error.This book will show how to use smartphone apps to detect the true sources of noise. Once the source of noise is known is known most maintenance persons will be able to work out how to eliminate the problem. 10 years ago I started using laptop computers and good quality microphones to detect and eliminate noise hazards.The price of the instrument was measured in the thousands of dollars.5 Years ago I started using video technology to overcome some of the limitations of walking around with a laptop. Now smartphones will do most of what I was doing 10 years ago with expensive equipment, and most of what I was doing with video.This book will show you how to use a Smartphone to detect noise.•Choosing Microphones •Using microphones •Calibrating Smartphones •dB Apps•Spectrum analyzer AppsOnce detected and measured noise can then be eliminated. Another of my books “Eliminate noise Hazards” can be used with this book.