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Applied Acoustics Course - A.Y. 2020/2021 FLIPPED CLASSROOM
Calendar with link to PPT presentations, AVI audio-video recordings,
notes
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Link to the MS-Teams for online interactive activity Use the following code for accessing the team without the need of asking permission to the teacher: nhhw618
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On each date the students should connect to the MS Team linked above, after having watched the corresponding video lessons and having read the notes. Having downloaded also the Powerpoint slides makes it easy to follow the lessons.
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On each day, during the first hour (08-09) a Q&A chat session is held, with no audio-video. During the second hour (09-10) an interactive seminar occurs, where an assistant or the students themselves solve some numerical problems related to the topic of the day or make experiments recording and processing sounds with different type of software.
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In some cases a student will have to explain a concept to the colleague.
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N. |
Date |
Time |
Topic |
Presentations |
Recordings |
Notes |
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0 |
21/09/2020 |
09:00-10:00 |
Course introduction, program, web page, methods |
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1 |
22/09/2020 |
08:00-09:00 |
Nature of sound, fundamental physical quantities |
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2 |
22/09/2020 |
09:00-10:00 |
Energy & Sound, scale of decibels |
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3 |
28/09/2020 |
08:00-09:00 |
Human auditory system, loudness evaluation, weighting curves |
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4 |
28/09/2020 |
09:00-10:00 |
The Sound Level Meter, equivalent level,
calibration |
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5 |
29/09/2020 |
08:00-09:00 |
Sum
and subtraction of values in dB,
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6 |
29/09/2020 |
09:00-10:00 |
Spectral Analysis, FFT, octave bands, Bark bands |
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7 |
05/10/2020 |
08:00-09:00 |
Free Field sound propagation, point sources, spherical divergence, directivity |
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8 |
05/10/2020 |
09:00-10:00 |
Linear sources, cylindrical divergence, excess attenuation, Noise screens, Maekawa formulas, examples |
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T-1 |
06/10/2020 |
09:00-10:00 |
First Intermediate Test (assignment) - RESULTS |
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9 |
12/10/2020 |
08:00-09:00 |
Indoor sound propagation, semi-reverberant field, critical distance |
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10 |
12/10/2020 |
09:00-10:00 |
Reverberation time, definition and Sabine's formula |
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11 |
13/10/2020 |
08:00-09:00 |
Environmental correction factor K2, sound propagation inside not-Sabinian rooms. |
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12 |
13/10/2020 |
09:00-10:00 |
Digital sampling of sound, digital filters, FFT, convolution in time and frequency domain |
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13 |
19/10/2020 |
08:00-09:00 |
Measurement of impulse response: impulsive sources, microphones |
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14 |
19/10/2020 |
09:00-10:00 |
Measurement of impulse response: loudspeakers, MLS and ESS methods |
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T-2 |
20/10/2020 |
09:00-10:00 |
Second Intermediate Test (assignment) - RESULTS |
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15 |
26/10/2020 |
08:00-09:00 |
ISO3382 standard, acoustical parameters: T20, T30, EDT, Clarity, Definition, Center Time, IACC, Jlf, G |
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16 |
26/10/2020 |
09:00-10:00 |
Speech Transmission Index: measurement and calculation |
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17 |
27/10/2020 |
08:00-09:00 |
Sound absorbing materials, typical products. Example of measurement of Alpha Sabine according to ISO 354 (reverberant room) |
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18 |
27/10/2020 |
09:00-10:00 |
Sound insulating materials, typical products. Frequency dependence of the Sound Reduction Index R, the Mass law, resonances and coincidence. |
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19 |
02/11/2020 |
08:00-09:00 |
Italian law about building acoustics (DPCM 5/12/1997), experimental assessment of compliance |
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20 |
02/11/2020 |
09:00-10:00 |
Italian law about environmental noise (L. 447/1995), acoustical zoning, the new EC standards based on Lden |
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T-3 |
03/11/2020 |
09:00-10:00 |
Third Intermediate Test (assignment) - RESULTS |
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21 |
09/11/2020 |
08:00-09:00 |
The Single Event Level (SEL) and its usage for evaluation of transportation noise |
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22 23 |
09/11/2020 |
09:00-10:00 |
Examples and exercises
regarding environmental noise |
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Examples and exercises
regarding noise at the workplace |
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24 |
10/11/2020 |
08:00-09:00 |
Digital Sound Processing, FIR and IIR filters, FFT, aliasing, windows, spectrogram |
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25 |
10/11/2020 |
09:00-10:00 |
Computation of FIR coefficients for inverse filters, the Kirkeby inversion, Auralization by convolution |
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26 |
16/11/2020 |
08:00-10:00 |
Measurement of the absorption coefficient: reverberant room, standing wave tube, sound intensity method, impulsive method |
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T-4 |
17/11/2020 |
09:00-10:00 |
Fourth Intermediate Test (assignment) - RESULTS |
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27 |
23/11/2020 |
08:00-09:00 |
Techniques employed for sound recording and reproduction, mono, stereo, multichannel, 3D, the Soundfield microphone, Ambisonics |
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28 |
23/11/2020 |
09:00-10:00 |
Wave Field Synthesis (WFS), loudspeaker arrays, the Casa del Suono lab in Parma |
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29 |
24/11/2020 |
08:00-09:00 |
Simulation of sound propagation outdoors employing the DISIA/CITYMAP software package |
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30 |
24/11/2020 |
09:00-10:00 |
Simulation of sound propagation indoors employing the RAMSETE/AURORA software package |
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E-1 |
30/11/2020 |
09:00-10:00 |
Experimental Measurements #1 |
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E-2 |
01/12/2020 |
09:00-10:00 |
Experimental Measurements #2 |
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E-3 |
14/12/2020 |
09:00-10:00 |
Experimental Measurements #3 |
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T-5 |
15/12/2020 |
09:00-10:00 |
Fifth Intermediate Test (assignment) - RESULTS |
This
spreadsheet contains the weighted score for the whole set of 5 in-class
tests, scaled to 30. Who reached 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 – all the material posted here cannot be
re-used, reproduced or broadcasted without authorization.
Last revision: 19 December 2020