Applied
Acoustics
Faculty of
Cultural Heritage Preservation – Ravenna
Il corso nell’A.A.
2011-12 è mutuato dall’analogo corso DAMS
Contenuto di
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Orario di ricevimento alunni |
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Modalità di esame |
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Avvisi e Comunicazioni |
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Materiale Didattico |
1 Fundamentals
Physical acoustics. Harmonic oscillator.
Fourier analysis. D'Alembert and Helmholtz equations. Acoustic quantities.
Sound speed in various media. Standing waves, interference, beats. The basics
of classical harmony. Sound rays. Absorption, reflection, transmission and
diffusion at an interfacie. Sound levels, decibel and spectra. Sounds signals.
Decibel. Frequency analysis. Spectra. (1/n) octave band filters. Frequency and
time weightings. Sound level metrics.
Basics of linear systems theory. The linear
system. Impulse response, frequency analysis. Shannon theorem. White, Pink
noise. Electric analogy
Psychophysical acoustics. Human hearing system.
Psychophysical aspects and their evaluation. Annoyance and hearing damage.
Acoustics in enclosures. Normal modes and coupled cavities.
Reverberation rooms and anechoic rooms. Reverberant and direct field.
Acoustic properties of materials Sound
insulation. Mass law. Resonances and coincidence. Internal loss. Double
and multilayer walls. Mechanical vibrations. Basic physics. Resonance.
Transmissibility. Acoustic absorption coefficient.
2. Instrumentation
Microphones. Accelerometers. Filters. Sound level meters.
Real time and FFT analysers. Digital recording and reproduction. AD/DA
conversion. Wave editor softwares.
3. Musical Instruments
Percussion Instruments (drums, plates). String
Instruments, (piano, violin, guitar, cello). wind Instruments ( brass
Instruments, Reed Instruments, Clarinet, Organ), electronic Instruments
(synthesizers; MIDI standard). The human voice. The sound production
4. Psycological aspect of
music
History of music notation: Pythagorean notation, Zerlino's
notation, the well-tempered (equabile) notation. Pitch, Loudness, Timbre,
Rythm.
5. Applications
Acoustics of musical Instruments. Acoustical
and non-acoustical criteria: vibrations, normal modes, cut-off frequencies in
sound tubes. Dendrocronology. Holographic techniques.
Room acoustics. Speech intelligibility. Concert hall
acoustics:. Beranek's work. Early reverberation times. The Schroeder's
integral. Energetic and Spaciousness parameters. Ando's theory. The
contemporary research. Physical and numerical models. Auralization.
Psycoacoustics.
Noise. Laws and technical standards. Personal exposure.
Noise control at the source. Hearing protectors.Environmental impact
assessment. Noise from industrial plant. Road, railway and airway traffic
noise.
5. Laboratory Measurement
Procedures
Acquiring and processing IRs in Theatres. Reverberation
time measurements. Sound absorption measurements. Binaural recording
techniques. Modal analysis techniques. Examples of measures on ancient musical
Instruments.
6. Research
A musical Instrument acoustic aspect.
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Week Day |
Hour |
Room |
Note |
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Monday |
9.00 - 11.00 |
Aula 2 - Ravenna |
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Tuesday |
10.00 - 11.00 |
Aula 6 - Ravenna |
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Link |
The Faculty of Cultural
Heritage Preservation