Fundamentals of Acoustics-I

Fundamentals of Acoustics is a core course that introduces the principles governing the generation, propagation, measurement, and control of sound and vibration. The course provides a strong theoretical foundation in acoustics while linking fundamental concepts to practical engineering and real-world applications across mechanical, civil, aerospace, and environmental domains.

The course begins with the basic physics of sound, covering wave motion, frequency, wavelength, sound speed, and sound pressure levels. Participants learn how sound propagates in different media such as air, liquids, and solids, and how boundary conditions and material properties influence acoustic behavior. Topics such as reflection, refraction, diffraction, and interference are discussed to explain sound behavior in enclosed and open environments.

Further, the course explores acoustic measurement techniques and instrumentation, including microphones, sound level meters, frequency analysis, and octave band analysis. Human hearing, psychoacoustics, and noise perception are also introduced to help participants understand how sound is perceived and evaluated. The principles of noise generation, transmission, and control are examined, with emphasis on practical noise reduction methods using absorption, insulation, and damping.

The course also introduces vibration fundamentals and their relationship to acoustics, along with basic room acoustics and environmental acoustics. Applications in noise control engineering, building acoustics, automotive and industrial noise, and product sound quality are highlighted through examples and case studies. By the end of the course, participants gain a clear understanding of acoustic principles and are equipped to analyze, measure, and control sound in engineering systems and environments.

source : NPTEL [ youtube]