By combining low cost common technologies, noise levels can be measured very accurately at low cost.Once detected accurately improvement is greatly simplified. Types of technology are Cell phones Video Music recording hard ware. Six Sigma and lean manufacturing principles. Software applications. Predictive and Preventive maintenance principles. Noise is a symptom of an inefficient process. The same methods that improve efficiency are also used to reduce noise levels, and keep them low. These are 5S Employee Involvement Visual Controls Problem solving - Six Sigma Predictive Maintenance. What you will find in this book are practical methods of how to reduce noise and save money. The techniques in this book have successfully reduced noise. In one case a planned acoustic enclosure was not built because these principles were included in construction. There was Zero cost. The final noise output was 25dB lower than similar machines with acoustic covers"