Acoustic engineering

This page is related to the Acoustics part of the Vibrations and acoustics MECA-H-411 BRUFACE course.

For the Vibrations part, please visit Arnaud Deraemaeker’s page.

Resources

  • Textbook in French
  • Textbook in English
  • 2019-2020 Powerpoint set in English: the course being now organized according to the inverted class principles, the slides are no longer presented as such. You may use them as an alternative to the textbook and videos but I do not warrant their compatibility with the 2021-2022 course content.
  • I need help: a discussion page where you can raise questions and (hopefully) get answers !

Video set and accompanying material

  • 000 – Introduction to the video series – 00’39
  • 001 – Definitions – 7’45 – Textbook: section 2.1
  • 002 – Relevance of acoustics – 4’12 – Textbook: section 2.4
  • 003 – Scope of acoustics – 17’48 – Textbook 2.2 and 4.2
  • 004 – Hypotheses of linear acoustics – 10’30 – Textbook 4.1
  • 005 – One-dimensional propagation – 18’00 – Textbook 4.3 and 4.4 (sections 4.5 and 4.6 are suggested as additional reading material)
  • There is no video on chapter 5 (Fourier analysis) because the basics of signal processing, Fourier series and Fourier transforms are assumed to be known. Please read chapter 5 or look at the corresponding slide set if you need a refresher. We’ll do some exercises in the classroom to get everyone up to speed on frequency domain analysis … which will be used throughout the course !
  • 006 – Acoustics in the frequency domain – 23’34 – Textbook 6.1 to 6.4 + Section 5.3.2.
    • Plane waves and spherical waves in the frequency domain – This topic will be covered in the classroom. Textbook 6.5 and 6.6. Note: Classroom related material will normally only be posted AFTER the classroom. We make an exception here because I’d like to get feedback on videos like this one. It requires a lot of work and if students are not quite interested I will not do more of them.
    • Here is a note clarifying the definition of (1) instantaneous intensity and its spectrum, (2) active intensity, (3) spectral density of active intensity and its relationship with the cross-correlation of the pressure and velocity signals.
    • If you are worried about the notion of phase reference, you may want to look at this note.
  • 007 – The decibel scale 16’57 – Textbook 7.1 and 7.2.
  • 008 – More on acoustic levels: weighted levels, band levels, time-dependent levels, statistical levels, white & pink noise – Textbook 7.3 and 7.4
  • 009 – Reflection under normal incidence
  • 010 – Reflection under oblique incidence