N.

Date

Time

Topic

Presentation

Recording

Note

0

29/09/2017

14.30-15.40

Course introduction, program, web page, examples

1

06/10/2017

13.45-14.40

Nature of sound, fundamental physical quantities

2

14.50-15.35

Energy & Sound, scale of decibels

3

15.45-16.40

Human auditory system, loudness evaluation, weighting curves

4

13/10/2017

13.45-14.40

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

5

14.50-15.35

Sum and subtraction of values in dB,  examples of dB summation, Spectral Analysis, FFT, octave bands, Bark bands

6

15.45-16.40

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

7

20/10/2017

13.45-14.40

Linear sources, cylindrical divergence, excess attenuation

8

14.50-15.35

Noise screens, Maekawa formulas, examples

9

15.45-16.40

Indoor sound propagation, semi-reverberant field, critical distance

10

27/10/2017

13.45-14.40

Reverberation time, definition and Sabine's formula

11

14.50-15.35

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

12

15.45-16.40

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

16:40-17:30

 First in-class test - Results

13

10/11/2017

13.45-14.40

Measurement of impulse response: impulsive sources, microphones

14

14.50-15.35

Measurement of impulse response: loudspeakers, MLS and ESS methods 

15.45-16.40

 Practical experiments of IR measurements (*)

15

17/11/2017

13.45-14.40

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

16

14.50-15.35

Speech Transmission Index: measurement and calculation 

17

15.45-16.40

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

18

24/11/2017

13.45-14.40

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

19

14.50-15.35

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

20

14.50-15.35

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

16:40-17:30

 Second in-class test - Results

21

01/12/2017

13.45-14.40

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

22

14.50-15.35

Examples and exercises regarding environmental noise

23

15.45-16.40

Examples and exercises regarding noise at the workplace

23

16.40-17.30

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

24

11/12/2017

re-scheduled
at 15.30 in Classroom 6

15.30-16.30

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

25

16.30-17.30

Fast convolution by FFT, partitioned convolution, computation of FIR coefficients for inverse filters, the Kirkeby inversion

26

17.30-18.30

 Third in-class test - Results

27

15/12/2017

13.45-14.40

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

28

14.50-15.35

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

29

15.45-16.40

Microphone arrays, virtual microphones, the RAI project

30

22/12/2017

15.45-16.40

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

31

13.45-14.40

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

32

14.50-16.40

Examples of written exams

16:40-17:30

 Fourth in-class test - Results

The final results of the in-class tests of current year 2017/2018 will be available here at the end of the course (in January 2018)