Learn · Basics of Noise and its Measurements

Lecture 46 of 48Module 8

Anechoic rooms

Prof. Nachiketa Tiwari · IIT Kanpur

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Basics of Noise and its Measurements, IIT Kanpur (at NPTEL)
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only.
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All the lectures

  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
  7. Modeling Sound Propagation Video
  8. The Momentum Equation Video
  9. The Continuity Equation & The Gas Law Video
  10. 1-D Wave Equation Video
  11. General Solution for 1-D Wave Equation Video
  12. Complex Time Signal & Transfer Functions Video
  13. Transmission line equations Video
  14. Planar Waves in Closed Tubes Video
  15. Planar Waves in 1-D Open Tubes Video
  16. A Semi-Infinite Tube and Overall Summary Video
  17. 1-D Tubes with Imperfect Terminations Video
  18. Measuring Impedance Through Kundt’s Apparatus Video
  19. Classification of Microphones Video
  20. Classification of Microphones- Continuation Video
  21. Classification of Microphones by Application Video
  22. Microphone Sensitivity Video
  23. Microphone Sensitivity- Continuation Video
  24. Selecting the Right Microphone Video
  25. Fourier Series Expansion Video
  26. Fourier Series Expansion - Continuation Video
  27. Fourier Integral Video
  28. Fourier Integral - Continuation Video
  29. Fourier Transform Video
  30. Fourier Transform - Continuation Video
  31. Discrete Fourier Transform (DFT) Video
  32. Discrete Fourier Transform (DFT)- Continuation Video
  33. DFT: Calculating Frequencies and Padding Video
  34. DFT: Influence of Duration and Sampling frequency on resolution Video
  35. FFT and Inverse FFT Video
  36. Considerations while deciding instrumentation Video
  37. Considerations while selecting instruments for noise measurements Video
  38. Measuring impedance through two microphone method Video
  39. Designing an impedance measurement tube Video
  40. Octave band analysis Video
  41. Calculating results in octave bands Video
  42. Weighting Video
  43. Short time Fourier transforms (STFT) Video
  44. Spectrograms Video
  45. Reverberation time Video
  46. Anechoic rooms Video
  47. STC, NRC and sound attenuation Video
  48. Reverberant rooms Video