Applied Acoustics Course - A.Y. 2021/2022

Calendar with link to PPT presentations, AVI audio-video recordings, notes and in-class tests

 

 

N.

Date

Time

Topic

Presentations

Old Recordings

New Recordings

Notes

0

20/09/2021

08:30-09:30

Course introduction, program, web page, methods - COVID rules

HTML

AVI

1

21/09/2021

08:30-09:30

Nature of sound, fundamental physical quantities

PPT

AVI

DOC

2

21/09/2021

09:30-10:30

Energy & Sound, scale of decibels

PPT

AVI

DOC

3

27/09/2021

08:30-09:30

Human auditory system, loudness evaluation, weighting curves

PPT AVI DOC

4

27/09/2021

09:30-10:30

The Sound Level Meter, equivalent level, calibration, time history with different time constants (slow, fast, etc.)

PPT AVI

5

28/09/2021

08:30-09:30

Sum and subtraction of values in dB, examples of dB summation, exercises with dBs

PPT AVI

DOC

6

28/09/2021

09:30-10:30

Spectral Analysis, FFT, octave bands, Bark bands

PPT AVI DOC

E-1

05/10/2021

08:30-10:30

Experimental Measurements #1 (Sound Level Meter, Calibrator, Spectrum Analyzer, Sound Intensity)

   

T-1

11/10/2021

08:30-10:30

First Intermediate Test - RESULTS

 

7

12/10/2021

08:30-09:30

Free Field sound propagation, point sources, spherical divergence, directivity

PPT AVI DOC

8

12/10/2021

09:30-10:30

Linear sources, cylindrical divergence, excess attenuation, Noise screens, Maekawa formulas, examples

PPT AVI DOC

9

18/10/2021

08:30-09:30

Indoor sound propagation, semi-reverberant field, critical distance

PPT AVI DOC

10

18/10/2021

09:30-10:30

Reverberation time, definition and Sabine's formula

PPT AVI DOC

11

19/10/2021

08:30-09:30

Environmental correction factor K2, sound propagation inside not-Sabinian rooms.

PPT AVI DOC

12

19/10/2021

09:30-10:30

Digital sampling of sound, digital filters, FFT, convolution in time and frequency domain

PPT AVI DOC

T-2

25/10/2021

08:30-10:30

Second Intermediate Test - RESULTS

 

13

26/10/2021

08:30-09:30

Measurement of impulse response: impulsive sources, microphones

PPT AVI DOC

14

26/10/2021

08:30-10:30

Measurement of impulse response: loudspeakers, MLS and ESS methods

PPT AVI DOC

15

02/11/2021

08:30-09:30

ISO3382 standard, acoustical parameters: T20, T30, EDT, Clarity, Definition, Center Time, IACC, Jlf, G

PPT AVI DOC

16

02/11/2021

09:30-10:30

Speech Transmission Index: measurement and calculation

PPT AVI DOC

E-2

08/11/2021

08:30-10:30

Experimental Measurements #2
(Room Impulse Response, Acoustical Parameters, STI)

     

17

09/11/2021

08:30-10:30

Sound absorbing materials, typical products. Example of measurement of Alpha Sabine according to ISO 354 (reverberant room)

PPT

AVI DOC

18

09/11/2021

09:30-10:30

Sound insulating materials, typical products. Frequency dependence of the Sound Reduction Index R, the Mass Law, resonances and coincidence.

PPT AVI DOC

19

15/11/2021

08:30-09:30

Italian law about building acoustics (DPCM 5/12/1997), experimental assessment of compliance

PPT AVI DOC

20

15/11/2021

09:30-10:30

Italian law about environmental noise (L. 447/1995), acoustical zoning, the new EC standards based on Lden

PPT AVI DOC

T-3

16/11/2021

08:30-10:30

Third Intermediate Test - RESULTS

 

21

22/11/2021

08:30-09:30

The Single Event Level (SEL) and its usage for evaluation of transportation noise

PPT AVI DOC

22

22/11/2021

09:30-10:30

Examples and exercises regarding environmental noise

AVI  

23

23/11/2021

08:30-09:30

Examples and exercises regarding noise at the workplace

AVI  

24

23/11/2021

09:30-10:30

Measurement of the absorption coefficient: reverberant room, standing wave tube, sound intensity method, impulsive method

PPT AVI DOC

25

29/11/2021

08:30-09:30

Digital Sound Processing, FIR and IIR filters, FFT, aliasing, windows, spectrogram

PPT AVI DOC

26

29/11/2021

09:30-10:30

Computation of FIR coefficients for inverse filters, the Kirkeby inversion, Auralization by convolution

PPT AVI DOC

T-4

30/11/2021

08:30-10:30

Fourth Intermediate Test

     

27

06/12/2021

08:30-09:30

Techniques employed for sound recording and reproduction, mono, stereo, multichannel, 3D, the Soundfield microphone, Ambisonics

PPT AVI   DOC

28

06/12/2021

09:30-10:30

Wave Field Synthesis (WFS), loudspeaker arrays, the Casa del Suono lab in Parma

PPT AVI   DOC

29

07/12/2021

08:30-09:30

Microphone Arrays, Acoustic Camera, Colour Mapping

PPT AVI   DOC

E-3

07/12/2021

09:30-10:30

Experimental Measurements #3 (Microphone arrays)

       

30

13/12/2021

08:30-09:30

Simulation of sound propagation  outdoors employing the DISIA/CITYMAP software package

PPT AVI   DOC

31

13/12/2021

09:30-10:30

Simulation of sound propagation indoors employing the RAMSETE/AURORA software package

AVI   DOC

T-5

14/12/2021

09:30-10:30

Fifth Intermediate Test (assignment) - RESULTS

       

 


This spreadsheet contains the weighted score for the whole set of 5 in-class tests of previous year. It is provided here for making clear to students how the scores obtained in the in-class tests will be evaluated and  scaled to 30. Who reaches 18/30 or above can do the oral exam directly. Instead who did not reach 18/30 needs to pass the written exam test the day of the oral exam. In any case all students can try to improve the score obtained with the in-class tests by performing the written exam test. The better of the two scores will be taken into account.


 

Copyright (C) Angelo Farina - reproduction prohibited without permission.
Last revised: 01/12/2021