AU3018 Noise, Vibration and Harshness Syllabus:
AU3018 Noise, Vibration and Harshness Syllabus – Anna University Regulation 2021
COURSEOBJECTIVES:
The objective of this course is to make the students understand the various types of vibration and noise along with their measurement and control techniques.
UNIT I FUNDAMENTALS OF ACOUSTICS AND NOISE, VIBRATION
Theory of Sound—Predictions and Measurement, Sound Sources, Sound Propagation in the Atmosphere, Sound Radiation from Structures and Their Response to Sound, General Introduction to Vibration, Vibration of Simple Discrete and Continuous Systems, Random Vibration, Response of Systems to Shock, Passive Damping.
UNIT II EFFECTS OF NOISE, BLAST, VIBRATION, AND SHOCK ON PEOPLE
General Introduction to Noise and Vibration Effects on People and Hearing Conservation, Sleep Disturbance due to Transportation Noise Exposure, Noise-Induced Annoyance, Effects of Infrasound, Low-Frequency Noise, and Ultrasound on People, Auditory Hazards of Impulse and Impact Noise, Effects of Intense Noise on People and Hearing Loss, Effects of Vibration on People, Effects of Mechanical Shock on People, Rating Measures, Descriptors, Criteria, and Procedures for Determining Human Response to Noise.
UNIT III ENGINE NOISE AND VIBRATION—SOURCES, PREDICTION, AND CONTROL
Introduction to ENGINE Noise and Vibration Sources, Internal Combustion Engine Noise Prediction and Control—Diesel, Exhaust and Intake Noise and Acoustical Design of Mufflers.
UNIT IV TRANSPORTATION NOISE AND VIBRATION SOURCES-PREDICTION AND CONTROL
Introduction to Transportation Noise and Vibration Sources, Tire/Road Noise—Generation, Aerodynamic Sound Sources in Vehicles—Prediction and Control, Transmission and Gearbox Noise and Vibration Prediction and Control, Brake Noise Prediction and Control.
UNIT V NOISE AND VIBRATION TRANSDUCERS, ANALYSIS EQUIPMENT, SIGNAL
PROCESSING, AND MEASURING TECHNIQUES
General Introduction to Noise and Vibration Transducers, Measuring Equipment, Measurements, Signal Acquisition, and Processing, Acoustical Transducer Principles and Types of Microphones, Vibration Transducer Principles and Types of Vibration Transducers, Sound Level Meters, Noise Dosimeters, Analyzers and Signal Generators, Equipment for Data Acquisition, Noise and Vibration Measurements, Determination of Sound Power Level and Emission Sound Pressure Level, Sound Intensity Measurements, Noise and Vibration Data Analysis, Calibration of Measurement Microphones, Calibration of Shock and Vibration Transducers, Metrology and Traceability of Vibration and Shock Measurements.
TOTAL: 45 PERIODS
COURSEOUTCOMES:
At the end of the course, the student will be able to
1. Classify the types of vibrations.
2. Identify the sources of noise in IC engines
3. Understand the effect of vibrations and noises.
4. Control vibration and noise with suitable techniques.
5. Apply engineering techniques and tools for NVH measurements.
TEXT BOOKS:
1. McConnell K, “Vibration Testing Theory and Practice”, John Wiley, 1995.
2. Norton M P, Fundamental of Noise and Vibration, Cambridge University Press,1989
REFERENCES:
1. Allan G. Piersol , Thomas L. Paez “Harris’ shock and vibration hand book” , McGraw-Hill , New Delhi, 2010
2. Clarence W. de Silva , “Vibration Monitoring, Testing, and Instrumentation “,CRC Press, 2007
3. David A.Bies and Colin H.Hansen “Engineering Noise Control: Theory and Practice “ Spon Press, London . 2009
4. Colin H Hansen “Understanding Active Noise Cancellation “ , Spon Press , London .2003
5. Matthew Harrison “Vehicle Refinement: Controlling Noise and Vibration in Road Vehicles “, Elsevier Butterworth-2004.