The Mine Health and Safety Actof 1977 seeks to protect miners by regulating their exposure to excessive noise in the mining environment. When a worker's exposure is found to be excessive, the utilization of existing engineering noise control measures are required to abate the noise. Over the past decade, the Bureau of Mines has undertaken a number of noise control programs aimed at establishing a technology base that can be used by industry to effect solutions to noise problems. Many of these hardware-oriented programs have provided the development and demonstration of retrofit noise control treatments for mining machinery. The purpose of this handbook is to synthesize evolving and available noise control information and disseminate it within the mining industry.