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Course11210419448 lectures

Basics of Noise and its Measurements

Prof. Nachiketa Tiwari · IIT Kanpur

Start with lecture 1 At NPTEL

Lectures

Module1

  1. Introduction Video
  2. Vibration versus Waves Video
  3. Nature of Sound Video
  4. The Decibel Scale Video
  5. Some Key Terms Video
  6. Adding Decibels Video

Module 2

  1. Modeling Sound Propagation Video
  2. The Momentum Equation Video
  3. The Continuity Equation & The Gas Law Video
  4. 1-D Wave Equation Video
  5. General Solution for 1-D Wave Equation Video
  6. Complex Time Signal & Transfer Functions Video

Module 3

  1. Transmission line equations Video
  2. Planar Waves in Closed Tubes Video
  3. Planar Waves in 1-D Open Tubes Video
  4. A Semi-Infinite Tube and Overall Summary Video
  5. 1-D Tubes with Imperfect Terminations Video
  6. Measuring Impedance Through Kundt’s Apparatus Video

Module 4

  1. Classification of Microphones Video
  2. Classification of Microphones- Continuation Video
  3. Classification of Microphones by Application Video
  4. Microphone Sensitivity Video
  5. Microphone Sensitivity- Continuation Video
  6. Selecting the Right Microphone Video

Module 5

  1. Fourier Series Expansion Video
  2. Fourier Series Expansion - Continuation Video
  3. Fourier Integral Video
  4. Fourier Integral - Continuation Video
  5. Fourier Transform Video
  6. Fourier Transform - Continuation Video

Module 6

  1. Discrete Fourier Transform (DFT) Video
  2. Discrete Fourier Transform (DFT)- Continuation Video
  3. DFT: Calculating Frequencies and Padding Video
  4. DFT: Influence of Duration and Sampling frequency on resolution Video
  5. FFT and Inverse FFT Video
  6. Considerations while deciding instrumentation Video

Module 7

  1. Considerations while selecting instruments for noise measurements Video
  2. Measuring impedance through two microphone method Video
  3. Designing an impedance measurement tube Video
  4. Octave band analysis Video
  5. Calculating results in octave bands Video
  6. Weighting Video

Module 8

  1. Short time Fourier transforms (STFT) Video
  2. Spectrograms Video
  3. Reverberation time Video
  4. Anechoic rooms Video
  5. STC, NRC and sound attenuation Video
  6. Reverberant rooms Video

Syllabus and materials

At NPTEL, as the course publishes them.

Credits and licence

Institution
IIT Kanpur
Department
Mechanical Engineering
Teacher
Prof. Nachiketa Tiwari
Level
Undergraduate
Language
English
Subjects
Engineering
Source
NPTEL
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
Attribution
NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge.
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