ACOUSTICS LABORATORY
Academic year and teacher
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- Versione italiana
- Academic year
- 2018/2019
- Teacher
- PATRIZIO FAUSTI
- Credits
- 6
- Curriculum
- COSTRUZIONI
- Didactic period
- Secondo Semestre
- SSD
- ING-IND/11
Training objectives
- Educational objectives
The laboratory aims to provide the student with the practical knowledge to carry out those activities in applied acoustics that can be correlated with professional and applied research aspects, in the field of building acoustics, environmental noise, architectural acoustics, noise in workplace. The aim is to put into practice the knowledge acquired in other acoustics courses, as regards the execution of numerical and instrumental evaluations, the ability to carry out simulations and calculations, to perform acoustic measurements, to carry out studies and write reports, to design solutions for noise reduction. Prerequisites
- Prerequisites
Knowledge on the fundamentals of acoustics, on the propagation of sound in the external and internal environment, on building, environmental and architectural acoustics, on technical standards and main legislation in the various fields of technical and professional acoustics. Course programme
- Course contents
The laboratory provides 60 hours of teaching including lectures, practical exercises and experiments in laboratory. In particular, about 25 hours of lectures and about 35 hours of practical exercises and measurements in the laboratory and on site.
Introduction to the course and analysis of acoustic signals (5 hours of lectures, 2.5 hours of laboratory measurements)
Presentation of the course. The job of the technician in acoustics.
Signal analysis (Sampling, Aliasing, Quantization, Clipping), Fast Fourier Transform (FFT), Windows, Correlation functions, Transfer functions, Coherence functions.
Filters (High-pass, Low-pass), Use of measurement programs (Recording, Time analysis, Frequency analysis), Measurement chain simulation (background noise).
Sound level meters, sound intensity and sound power measurement (2.5 hours frontal, 5 hours laboratory)
Description of the instrumentation for sound level measurements and of the measurement methods. Intensity probe, Sound power of a source (theory and legislation), Example of calculation of the sound power of a source. Sound power measurements with sound pressure and sound intensity methods. Calculation methods of the environmental correction factor K2; differences between the procedures. Data processing.
Environmental noise: legislation and standards; executive criteria for planning and noise reduction methods (2.5 lectures, 5 hours of case study analysis)
References to the legislative framework in force in Italy. Examples of climate and impact evaluations. Case studies for the evaluation of the acoustic impact of construction site activities and major works. Noise analysis of a continuous cycle plant and methods for calculating the contribution of single sources. Case study of the extension of a hospital: analysis of the impact of construction sites and assessments of climate and acoustic impact. Noise analysis of construction sites of a large work to evaluate the impact on naturalistic areas. Analysis of a case study of the acoustic classification of the territory. Description of the Noise Reduction Plan of a medium-sized city.
Environmental noise monitoring and port and airport noise management (2.5 hours laboratory and 5 hours frontal)
Environmental noise, use of control units and data analysis; Airport noise; Port noise.
Practical exercises on the use of software for sound propagation and acoustic mapping (5 hours frontal; 6 hours laboratory)
Presentation of the SoundPlan program with example (creation and insertion of elements, simulation, visualization of tabular and graphic results); Sound plan exercise: acoustic impact prediction and acoustic climate prediction.
Forensic acoustics (5 hours frontal)
Description of the activities aimed at technical consultancy in the judicial field. Problems related to noise and vibrations in the various areas of civil litigation. Possible roles of the Competent Technician: Office Technical Consultant (CTU) or Party (CTP).
Acoustic properties of materials (5 hours laboratory)
Type and characteristics of porous materials (physical and mechanical parameters), resistivity measurement, impedance measurement, absorption measurement for direct and diffuse accidents, theoretical models.
Experimental measurement of the passive acoustic requirements of buildings (5 hours laboratory)
Practical measurement and reporting activities regarding the measurement of façade, foot traffic and airborne noise on site. Measurements carried out by students under the guidance of teachers between adjacent classrooms in the Engineering department.
Practical exercises on the use of software to design the acoustic requirements of buildings (5 hours of exercises)
Guided tutorial on using spreadsheets for acoustic design. In particular, acoustic design of all aspects related to the case study of a school. Didactic methods
- Didactic methods
The teaching includes lectures, practical exercises and measurements in the laboratory and on site.
As part of the individual study, in addition to the theoretical study, the students will prepare reports and technical reports on the exercises carried out, will carry out a certain number of hours of exercises using both the commercial software made available and the laboratory equipment, working both in small groups and individually, with the support and help of didactic tutors.
As part of the individual study, the additional practical activities can be estimated in about 30 hours. Learning assessment procedures
- Learning assessment procedures
Oral exam with also discussion on the practical experiments and measurements carried out during the course. Reference texts
- Teaching books and materials
Teaching materials (in Italian)
Lecture notes and notes distributed by the teachers.
Notes from the School of Acoustics of the University of Ferrara.
Brochure "Acoustics in building", author Patrizio Fausti, published by Rockwool, downloadable from the Rockwool website.
INAIL manuals and brochures.
Instruction manuals for measuring equipment and instrumentation.
Books for consultation (in Italian)
Acoustics. Foundations and applications, edited by R. Spagnolo, UTET University, 2015.
Manual of applied acoustics, edited by R. Spagnolo, Città Studi Editore, ed. 2008.
E.Cirillo, Applied Acoustics, Mc Graw-Hill, Milan (1997).
