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Risorse bibliografiche
Risorsa bibliografica obbligatoria
Risorsa bibliografica facoltativa
Scheda Riassuntiva
Anno Accademico 2016/2017
Scuola Scuola di Architettura Urbanistica Ingegneria delle Costruzioni
Insegnamento 097636 - ACOUSTICS IN BUILDINGS
Docente Mazzarella Livio
Cfu 6.00 Tipo insegnamento Monodisciplinare

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Nome Sezione Insegnamento
Arc - Urb - Cost (Mag.)(ord. 270) - MI (1095) BUILDING AND ARCHITECTURAL ENGINEERINGBE1AZZZZ097636 - ACOUSTICS IN BUILDINGS

Programma dettagliato e risultati di apprendimento attesi

EDUCATIONAL OBJECTIVES and LEARNING OUTCOMES EXPECTED

The course aims to provide the base knowledge and tools for the analysis of the generation, propagation, reception and perception of sound in various human activities. In this course, an introduction to the study in acoustics will be conferred and, in particular, a full understanding on definitions and physical concept of various involved acoustical features will be emphasized. Physical modelling and mathematical formulation for analysing the sound will be also covered together with their applications to architecture (i.e. buildings noise protection and indoor sound quality).

 

A) LESSONS PROGRAM

1. Introduction

1.1 Short History of Acoustics

1.2 Basic Knowledge about Sound and Vibration

1.3 Harmonic Functions and Phasors

1.4 Mechanical Vibrations

1.5 Equivalent Electrical Circuit

1.6 Impedance and Admittance

1.7 Linear Combination of Simple harmonic Oscillators

1.8 Harmonic Analysis: Fourier Series and Fourier Transform

2. Fundamentals of Oscillations and Wave Motion

2.1 Simple Oscillators

2.2 Linear Array of Oscillators

2.3 Wave Propagation

2.4 Wave Diagram

2.5 Waves in Flexible String

2.6 Standing Wave and Normal Modes in String

2.7 Waves in String Driven from One End

3. Wave Equation for Sound Propagation in Gas media

3.1 Derivation of Wave Equation

3.2 Wave Equation for a Fluid medium in Motion

3.3 Thermodynamic Condition for Sound Propagation

3.4 Compressibility

3.5 Linearized Equations

3.6 Velocity Potential Expression

3.7 Speed of Sound

3.8 Acoustic Energy Quantities

3.9 Plane Waves (1-D Waves)

3.10 Arbitrary Plane Waves

3.11 3-D Waves

3.12 Rays and Waves*

3.13 Complex Sound Intensity*

4. Outdoor sound propagation

4.1 Ideal sound propagation (spreading losses)

4.2  Sound attenuation

4.3 Attenuation by atmospheric absorption

4.4 Reflection from the surface of a solid

4.5 Attenuation over the ground

4.6 Refraction

4.7 Diffraction

11 Sound reduction

5. Sound Reflection and Transmission at Discontinuities

5.1 Oblique Incidence

5.2 Reflection at a Solid or Porous Surface*

5.3 Normal Incidence

5.4 Sound Transmission through Rigid Infinite Walls

5.5 Sound Transmission through Flexible Infinite Walls

5.6 A Generalized Derivation of Mass Law

5.7 Evanescent Waves*

6. Absorption and Attenuation of Sound

6.1 Effect of Viscosity

6.2 Effect of Heat Conduction

6.3 Molecular Thermal Relaxation*

6.4 Sound Absorbing Materials*

7. Room Acoustics

7.1 Sound propagation in rooms:

7.1.1 the sound field at an impedance interface

7.1.2  physical room acoustics,

7.1.3 geometrical room acoustics,

7.1.4 statistical room acoustics,

7.1.5 diffuse sound fields

7.2 Reverberation and reverberation time

7.3 Acoustic insulation

8. Architectural acoustics

8.1 Interior space acoustics

8.2 Sound quality index

 

B) APPLICATIONS

The applications are based on assigned practical problems which will be solved with the aid of preformed Excel spreadsheets. Each student will complete them to solve the assigned problems in the appropriate way.

Before tutors explain the topics and give a tutorial to the specific problem solution.


Note Sulla Modalità di valutazione

Final written and oral examination with comprehensive evaluation of the report on what developed during the applications. The report must be delivered within the first examination session immediately after the course ends.


Bibliografia
Risorsa bibliografica obbligatoriaHeinrich Kuttruff, Room acoustics, Editore: Elsevier Science Publishers, Anno edizione: 2009, ISBN: 0-415-48021-3
Risorsa bibliografica obbligatoriaHeinrich Kuttruff, Acoustics, An introduction, Editore: Taylor & Francis, Anno edizione: 2007, ISBN: 0-203-97089-6

Mix Forme Didattiche
Tipo Forma Didattica Ore didattiche
lezione
40.0
esercitazione
16.0
laboratorio informatico
0.0
laboratorio sperimentale
0.0
progetto
0.0
laboratorio di progetto
0.0

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.6.5 / 1.6.5
Area Servizi ICT
17/06/2021