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Applied Acoustics Course - A.Y. 2021/2022
Calendar with link to PPT presentations, AVI audio-video recordings,
notes
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N. |
Date |
Time |
Topic |
Presentations |
Old Recordings |
New Recordings |
Notes |
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0 |
20/09/2021 |
08:30-10:30 |
Course introduction, program, web page, methods - COVID rules |
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1 |
21/09/2021 |
08:30-09:30 |
Nature of sound, fundamental physical quantities |
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2 |
21/09/2021 |
09:30-10:30 |
Energy & Sound, scale of decibels |
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3 |
27/09/2021 |
08:30-09:30 |
Human auditory system, loudness evaluation, weighting curves |
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4 |
27/09/2021 |
09:30-10:30 |
The Sound Level Meter, equivalent level,
calibration |
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5 |
28/09/2021 |
08:30-09:30 |
Sum
and subtraction of values in dB,
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6 |
28/09/2021 |
09:30-10:30 |
Spectral Analysis, FFT, octave bands, Bark bands |
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E-1 |
05/10/2021 |
08:30-10:30 |
Experimental Measurements #1 (Sound Level Meter, Calibrator, Spectrum Analyzer, Sound Intensity) |
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T-1 |
11/10/2021 |
08:30-10:30 |
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7 |
12/10/2021 |
08:30-09:30 |
Free Field sound propagation, point sources, spherical divergence, directivity |
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8 |
12/10/2021 |
09:30-10:30 |
Linear sources, cylindrical divergence, excess attenuation, Noise screens, Maekawa formulas, examples |
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9 |
18/10/2021 |
08:30-09:30 |
Indoor sound propagation, semi-reverberant field, critical distance |
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10 |
18/10/2021 |
09:30-10:30 |
Reverberation time, definition and Sabine's formula |
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11 |
19/10/2021 |
08:30-09:30 |
Environmental correction factor K2, sound propagation inside not-Sabinian rooms. |
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12 |
19/10/2021 |
09:30-10:30 |
Digital sampling of sound, digital filters, FFT, convolution in time and frequency domain |
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T-2 |
25/10/2021 |
08:30-10:30 |
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13 |
26/10/2021 |
08:30-09:30 |
Measurement of impulse response: impulsive sources, microphones |
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14 |
26/10/2021 |
09:30-10:30 |
Measurement of impulse response: loudspeakers, MLS and ESS methods |
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15 |
02/11/2021 |
08:30-09:30 |
ISO3382 standard, acoustical parameters: T20, T30, EDT, Clarity, Definition, Center Time, IACC, Jlf, G |
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16 |
02/11/2021 |
09:30-10:30 |
Speech Transmission Index: measurement and calculation |
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E-2 |
08/11/2021 |
08:30-10:30 |
Experimental Measurements #2 |
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17 |
09/11/2021 |
08:30-09:30 |
Sound absorbing materials, typical products. Example of measurement of Alpha Sabine according to ISO 354 (reverberant room) |
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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. |
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19 |
15/11/2021 |
08:30-09:30 |
Italian law about building acoustics (DPCM 5/12/1997), experimental assessment of compliance |
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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 |
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T-3 |
16/11/2021 |
08:30-10:30 |
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21 |
22/11/2021 |
08:30-09:30 |
The Single Event Level (SEL) and its usage for evaluation of transportation noise |
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22 |
22/11/2021 |
09:30-10:30 |
Examples and exercises
regarding environmental noise |
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23 |
23/11/2021 |
08:30-09:30 |
Examples and exercises
regarding noise at the workplace |
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24 |
23/11/2021 |
09:30-10:30 |
Measurement of the absorption coefficient: reverberant room, standing wave tube, sound intensity method, impulsive method |
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25 |
29/11/2021 |
08:30-09:30 |
Digital Sound Processing, FIR and IIR filters, FFT, aliasing, windows, spectrogram |
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2 |
29/11/2021 |
09:30-10:30 |
Computation of FIR coefficients for inverse filters, the Kirkeby inversion, Auralization by convolution |
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T-4 |
30/11/2021 |
08:30-10:30 |
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27 |
06/12/2021 |
08:30-09:30 |
Techniques employed for sound recording and reproduction, mono, stereo, multichannel, 3D, the Soundfield microphone, Ambisonics |
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28 |
06/12/2021 |
09:30-10:30 |
Wave Field Synthesis (WFS), loudspeaker arrays, the Casa del Suono lab in Parma |
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29 |
07/12/2021 |
08:30-09:30 |
Microphone Arrays, Acoustic Camera, Colour Mapping |
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E-3 |
07/12/2021 |
09:30-10:30 |
Experimental Measurements #3 (Microphone arrays) |
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30 |
13/12/2021 |
08:30-09:30 |
Simulation of sound propagation outdoors employing the DISIA/CITYMAP software package |
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31 |
13/12/2021 |
09:30-10:30 |
Simulation of sound propagation indoors employing the RAMSETE/AURORA software package |
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T-5 |
14/12/2021 |
08:30-10:30 |
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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 need to pass the written 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.