Noise, Vibration & Harshness and Safety(Department — Summer 2019

Write the definitions for Noise, vibration and Harshness. Also write down the relevance of it in Automotive discipline?

Explain the terms: 1] Degree of freedom 2]Time period 3]frequency 4]Amplitude

Explain with sketch principle of Roll, Pitch and yaw phenomena for velocity and moments.

Explain sound wave propagation?

Write a difference between Structure borne and air borne sound.

Explain the harmful effects of vibration and noises in the vehicular body as well as on occupants and also explain its eliminating and reduction methods

Discuss with sketch the anatomy of human ear and mechanism of hearing.

Write a short note on psychological effect of noise on human.

Explain for Transmission whine& Rattle noise with its frequency range.

Automotive engine can have six degree of vibration: Justify, also Explain characteristics and sources of vibration from engine.

Categorized the mechanical vibration and also discuss the Damped and Un-damped vibration in details.

Which are the factors affecting on Piston Slap noise? Also write counter measures for it.

Explain in details Bearing noise, Cam system noise and Timing chain noise from automotive vehicle.

Write the various vibration and noise reduction methods.

Explain working principle of Vibration pickups.

What do you mean by Air pumping noise? From where it is being generated? How the Tread pattern has significance on air pumping noise.

Write down for churning effect in automobile transmitter system and compare it shortly with vibration phenomena.

Explain with neat sketch vehicle “Pass-by Noise” method with different running conditions.

Draw and explain vibration transfer path from vehicle suspension system to the other included systems.

Write down different vibration analysis softwares.

Explain working of Mechanical type vibration exciter with sketch.

Explain Squeak, Rattle and Buzz noise with its frequency range. Also explain their noise generating points and reduction in vehicle.

List out the NVH-legislations applicable for vehicle in India.

With the sketch discuss seat and steering wheel vibrations.

Discuss Vibrations and Noise in driveline systems. Also write for term driveline boom, clunk, axle whine, and shuffle.