N.

Date

Time

Topic

Presentation

Recording

Note

0

20/09/2019

13.45-14.40

Course introduction

1

14.50-15.35

Nature of sound, fundamental physical quantities

2

15.45-16.40

Energy & Sound, scale of decibels

27/09/2019

Notte dei Ricercatori, NO LESSON !!!
come visiting our boot in Scientific Engineering building #10,
and enjoy Acoustics Virtual reality applications

3

04/10/2019

13.45-14.40

Human auditory system, loudness evaluation, weighting curves

4

14.50-15.35

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

5

15.45-16.40

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

6

11/10/2019

13.45-14.40

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

7

14.50-15.35

Linear sources, cylindrical divergence, excess attenuation

8

15.45-16.40

Noise screens, Maekawa formulas, examples

9

18/10/2019

13.45-14.40

Indoor sound propagation, semi-reverberant field, critical distance

10

14.50-15.35

Reverberation time, definition and Sabine's formula

11

15.45-16.40

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

12

16:40-17:30

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

13

25/10/2019

13.45-14.35

Measurement of impulse response: impulsive sources, microphones

14

14.45-15.30

Measurement of impulse response: loudspeakers, MLS and ESS methods

15.40-16.30

 Practical experiments of IR measurements (*)

16:30-17:30

 First in-class test 2019  -  RESULTS

15

08/11/2019

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

15/11/2019

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

15.45-16.40

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

22/11/2019

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

29/12/2019

Cerimonia di Inaugurazione Anno Accademico - Lessons suspended!

24

06/12/2019

13.45-14.40

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

25

14.50-15.35

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

26

15.45-16.40

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

16.40-17.30

 Third in-class test - RESULTS

27

13/12/2019

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

29

15.45-16.40

Microphone arrays, virtual microphones, the RAI project

30

20/12/2019

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

Final exercises, previous exam problems

16:40-17:30

 Fourth in-class test - RESULTS