Basics of Noise and its Measurements. Instructor: Prof. Nachiketa Tiwari, Department of Mechanical Engineering, IIT Kanpur.
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September 23, 2023
English
English [CC]
Description
This course is intended for all those who want to conduct experiments in area of NVH. Thus, the course is open to students of engineering and science, and also to all those who from the industry and research organizations - who are working in area of sound, NVH and acoustics. Each lecture will be followed by a quiz, which will help student the concepts better, and gain deeper insights to measurement process. The course is fairly generic so that there is no need for a particular background. Rather, what is needed is openness, and ability to learn and check out new ideas with comfort. (from nptel.ac.in)
Course Curriculum
- Lecture 01 – Introduction Unlimited
- Lecture 02 – Vibration versus Waves Unlimited
- Lecture 03 – Nature of Sound Unlimited
- Lecture 04 – The Decibel Scale Unlimited
- Lecture 05 – Sound Terminology Unlimited
- Lecture 06 – Adding Decibels Unlimited
- Lecture 07 – Modeling Sound Propagation Unlimited
- Lecture 08 – The Momentum Equation Unlimited
- Lecture 09 – The Continuity Equation and the Gas Law Unlimited
- Lecture 10 – 1-D Wave Equation Unlimited
- Lecture 11 – General Solution for 1-D Wave Equation Unlimited
- Lecture 12 – Complex Time Signal and Transfer Functions Unlimited
- Lecture 13 – Transmission Line Equations Unlimited
- Lecture 14 – Planar Waves in Closed Tubes Unlimited
- Lecture 15 – Planar Waves in 1-D Open Tubes Unlimited
- Lecture 16 – A Semi-infinite Tube and Overall Summary Unlimited
- Lecture 17 – 1-D Tubes with Imperfect Terminations Unlimited
- Lecture 18 – Measuring Impedance Through Kundt’s Apparatus Unlimited
- Lecture 19 – Classification of Microphones Unlimited
- Lecture 20 – Classification of Microphones (cont.) Unlimited
- Lecture 21 – Classification of Microphones by Application Unlimited
- Lecture 22 – Microphone Sensitivity Unlimited
- Lecture 23 – Microphone Sensitivity (cont.) Unlimited
- Lecture 24 – Selecting the Right Microphone Unlimited
- Lecture 25 – Fourier Series Expansions Unlimited
- Lecture 26 – Fourier Series Expansions (cont.) Unlimited
- Lecture 27 – Fourier Integral Unlimited
- Lecture 28 – Fourier Integral (cont.) Unlimited
- Lecture 29 – Fourier Transform Unlimited
- Lecture 30 – Fourier Transform (cont.) Unlimited
- Lecture 31 – Discrete Fourier Transform (DFT) Unlimited
- Lecture 32 – Discrete Fourier Transform (cont.) Unlimited
- Lecture 33 – DFT: Calculating Frequencies and Padding Unlimited
- Lecture 34 – DFT: Influence of Duration and Sampling Frequency on Resolution Unlimited
- Lecture 35 – Fast Fourier Transform (FFT) and Inverse FFT Unlimited
- Lecture 36 – Considerations while Deciding Instrumentation Unlimited
- Lecture 37 – Considerations for Selecting Instruments for Noise Measurements Unlimited
- Lecture 38 – Measuring Impedance using the Two Microphone Method Unlimited
- Lecture 39 – Designing an Impedance Measurement Tube Unlimited
- Lecture 40 – Octave Band Analysis Unlimited
- Lecture 41 – Calculating Results in Octave Bands Unlimited
- Lecture 42 – Weighting Unlimited
- Lecture 43 – Short Time DFT Unlimited
- Lecture 44 – Short Term Fourier Transforms and Spectrograms Unlimited
- Lecture 45 – Reverberation Time Unlimited
- Lecture 46 – Anechoic Rooms Unlimited
- Lecture 47 – Sound Transmission Class, Noise Reduction Coefficient, Sound Attenuation Unlimited
- Lecture 48 – Reverberant Room Unlimited
About the instructor
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