BUILDING AND ENVIRONMENTAL ACOUSTICS
Academic year and teacher
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- Versione italiana
- Academic year
- 2015/2016
- Teacher
- PATRIZIO FAUSTI
- Credits
- 9
- Curriculum
- COSTRUZIONI
- Didactic period
- Primo Semestre
- SSD
- ING-IND/11
Training objectives
- The course aims to supply students with the fundamentals regarding the nature of the noise and the ways in which it can be controlled in the environment and in buildings while respecting technical norms and enforced legislation.
Prerequisites
- Basic notions on generation, analysis and propagation of sound.
Course programme
- - Fundamentals of acoustics (10 hours).
The sound phenomenon. Main acoustical parameters: pressure, intensity, density and impedance. Sound levels and decibel scale. Frequency analysis: octave and one third octave bands. Human response to sound. Weighting curves. Sound propagation in the atmosphere: plane, spherical and cylindrical waves, effects of attenuation with propagation, acoustic barriers. Absorption, reflection and transmission effects. Sound transmission loss: the mass law, resonance and coincidence. Acoustics in enclosed spaces: geometric and energetic-statistics theories, Sabine theory. Steady energy density, reverberation time. Acoustic fields. Parameters for evaluation of acoustic quality of enclosed spaces.
- Measurement techniques and instrumentation (10 hours)
Sound level and frequency analysis measurements: microphones, time weighting, filters, equivalent level and SEL, tonal and impulsive noise. Measures of reverberation time and impulse response. Measures of sound insulation and impact noise, single number quantities.
- Building acoustics (20 hours)
The enforced legislation on acoustic requirements in buildings. Absorbing materials. Physical properties correlated with acoustic performances: flow resistance and dynamic stiffness. Behaviour of materials with respect to sound insulation and impact noise: single walls, double walls, floating floors, facades. The in situ behaviour of structures: flanking transmission, European norms.
- Environmental acoustics (20 hours)
The impact of noise on the population. The enforced legislation on environmental noise. European directives. Acoustic classification of the territory. Noise control and reduction systems. Methodologies for the measurement and the evaluation of noise. Simple methods for the prediction and reduction of traffic and railway noise. Prediction methods for industrial noise (ISO 9613-2). Models of calculation on PC. Didactic methods
- Theoretical and practical classes
Learning assessment procedures
- Oral exam
Reference texts
- Materiale didattico
Dispense e appunti distribuiti dal docente
Testi per consultazione
Manuale di Acustica, a cura di R. Spagnolo, UTET, 2001.
E.Cirillo, Acustica Applicata, Mc Graw-Hill, Milano (1997).
