" Machines talk and it pays to listen". Efficient machine health monitoring and fault diagnosis provides lot of benefits including early detection of impending machinery failure to help lower the risk of unscheduled downtime,extended life cycle of the equipment, scheduling and efficient utilization of maintenance resources and availability of global condition monitoring data. This book provides an understanding of the basics of vibration analysis , how to apply vibration analysis for different gear faults and overview of application of Sideband Energy Ratio Technique in gear fault diagnosis using case studies. Typical people who will find this book useful include: Vibration Analysts, Condition Monitoring Engineers, Maintenance Engineers & Technicians and Research scholars