BUILDING, ENVIRONMENTAL AND ROOM ACOUSTICS
Academic year and teacher
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- Versione italiana
- Academic year
- 2017/2018
- 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, in buildings and in listening spaces, while respecting technical norms and enforced legislation.
Prerequisites
- Basic notions on generation, analysis and propagation of sound.
Course programme
- - Measurement techniques and instrumentation (20 hours)
Recall about fundamentals of acoustics: main acoustical parameters, sound levels and decibel scale, weighting curves, frequency analysis, sound propagation in the open air, acoustics in the close spaces.
Sound level and frequency analysis measurements: microphones, time weighting, filters, equivalent level and SEL, tonal and impulsive noise. Measurements of sound intensity. Measurements of sound power. Measures of reverberation time and impulse response.
- Building acoustics (25 hours)
The enforced legislation on acoustic requirements in buildings. Measures of sound insulation and impact noise, single number quantities. 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.
- Room acoustics (25 hours)
Recall about absorption and reflection, acoustic fields. The paradigm of acoustic communication in rooms: noise source, propagation, listening (subjective listening and binaural perception). The sound in closed spaces. Impulse response and acoustic indicators (time distribution reflections, objective parameters for music and speech, optimal values, criteria for equipment noise). Measurement of impulse response, calculation of acoustical parameters according to ISO-3382. Acoustic design (project phases, building envelope and systems, shape and sizing of the room for acoustic purposes, typology and distribution of coating materials). Forecast models (statistical, numeric, physical scale models). The auralization and the restitution systems. Presentation and discussion of case studies. 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).
