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Risorse bibliografiche
Risorsa bibliografica obbligatoria
Risorsa bibliografica facoltativa
Scheda Riassuntiva
Anno Accademico 2019/2020
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 052834 - ELECTRONICS AND ELECTROACOUSTICS FOR SOUND ENGINEERING
  • 052833 - ELECTRONICS AND ELECTROACOUSTICS FOR SOUND ENGINEERING - MODULE 2: ELECTROACOUSTICS FOR SOUND ENGINEERING
Docente Bertuccio Giuseppe
Cfu 5.00 Tipo insegnamento Modulo Di Corso Strutturato

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - MI (263) MUSIC AND ACOUSTIC ENGINEERING*AZZZZ052831 - ELECTRONICS AND ELECTROACOUSTICS FOR SOUND ENGINEERING - MODULE 2: ELECTROACOUSTICS FOR SOUND ENGINEERING
052834 - ELECTRONICS AND ELECTROACOUSTICS FOR SOUND ENGINEERING
Ing Ind - Inf (Mag.)(ord. 270) - MI (476) ELECTRONICS ENGINEERING - INGEGNERIA ELETTRONICA*AZZZZ052834 - ELECTRONICS AND ELECTROACOUSTICS FOR SOUND ENGINEERING

Obiettivi dell'insegnamento

The aim of the course-module 2-Electroacoustics is to provide an in-depth knowledge on devices and systems for the acquisition and diffusion of sound and audio signals.


Risultati di apprendimento attesi

Dublin Descriptors

Expected learning outcomes

1) Knowledge and understanding

·         know and understand the physical properties of the different devices for sound and audio signals acquisition and diffusion.

·         know the characteristics and properties of the devices and systems for sound and audio signals acquisition and diffusion

2) Applying knowledge and understanding

·         Analize specifications of microphones and sound transducers.

·         Analize specifications of loudspeakers and arrays.

5) Lifelong learning skills

·         Students will learn how to analyze and design devices for sound and audio signals acquisition and diffusion.


Argomenti trattati

Sound Fields: Pressure, Free, Diffuse fields; Sound Pressure Level (SPL), unit, measurement. Phonometers.

 

Microphones:

Classification, principle of transductions, moving coil microphones, condenser microphones. Electro‑mechanical models.

Sensitivity: definition, unit, measurement, dependence on microphone characteristics.

Pickup patterns: omnidirectional, bidirectional, cardioid, supercardioid, Hypercardioid; omnidirectionality limit; multiple pattern microphones; interference tube microphones.

Frequency response: diaphragm size dependence, proximity effect and electronic compensation, low‑frequency response control, static pressure equalization vent, wind screens.

Microphone noise: origin, physical-mathematical model, measurement, unit, typical values.

Dynamic range: measurement microphones, sound reinforcement microphones.

Microphone front-end electronics: architecture, preamplifier and output stage, output impedance. Wireless microphones.

Micro-Electro-Mechanical Systems (MEMS) microphones: silicon technology, MEMS process, fabrication steps, specifications. MEMS microphones and processing electronics integrated systems.

Professional microphones for voice and musical instruments: specification sheets of AKG, Neumann, Shure devices.

Electro-Mechano-Acoustical Devices Modeling

Mechanical and acoustical elements: mass, compliance, resistance, properties and equations. Impedance and admittance analogies. Electro-mechanical and mechano-acoustic transducers: physics and models. Models based on transformers and gyrators. Application to microphones: pressure and pressure gradient devices, directivity. Application to loudspeakers: physics, equation and electrical model.

 

Sound transducers:

Magnetic and piezoelectric pickups: principle of operation, impedance, frequency response, dynamic range.

  

Loudspeakers:

Introduction: principles of electromagnetism.

Loudspeaker drivers 1: Structure and classification. Working principle. Low frequency modeling by equivalent circuits in electrical, mechanical and acoustical domains. Loudspeaker enclosures: closed and vented box, passive radiator. Other acoustic loads: horns, compression chambers, phase plugs. Elements of mid and high frequency design and performance.

Loudspeaker drivers 2: Loudspeaker measurements: electrical impedance, frequency response, harmonic distortion, directivity. Techniques and tools for loudspeaker driver design. Study and characterization of the nonlinear behavior of loudspeakers.

Loudspeaker systems design: the full range speaker, passive and active crossovers and filters, DSP processing, loudspeaker specifications: sensitivity, rated power, impedance, directivity. Practical analysis and test of a K-array speaker.

Line array arrangement: physical principles, history, electronically steerable arrays, subwoofer arrays, simulation in acoustic cad, application examples, listening session.


Prerequisiti

Fundamentals of Electrical and Electronic devices and circuits


Modalità di valutazione

Type of Assessment

Description

Dublin descriptor

Written test

·         Solution of numerical problems on audio devices coupled to electronics

·         Critical discussion on the data-sheet of a microphone or loudspeaker

·         Questions on topics of the course’s program

1, 2

   

1, 2, 5

Oral test

·         Discussion on problems of the written test

·         Questions on topics of the course’s program

·         Analytical solution of problems on audio devices coupled to electronics

1, 2

 1

 1, 2, 5


Bibliografia
Risorsa bibliografica obbligatoriaG. Bertuccio - Electronics and Electroacoustics for Sound Engineering https://beep.metid.polimi.it/
Note:

available as pdf file in the course's website on BeeP

Risorsa bibliografica obbligatoriaG. Bertuccio - electronic board notes https://beep.metid.polimi.it/
Note:

available as pdf files in the course'w website on Beep

Risorsa bibliografica obbligatoriaGiuseppe Bertuccio, Roberto Magalotti, Davide Mochi, Electroacoustics: Lecture slides and notes https://beep.metid.polimi.it/
Note:

EEASE course on BeeP web site

Risorsa bibliografica facoltativaLeo L. Beranek, Tim J. Mellow, Acoustics: Sound Fields and Transducers, Editore: Academic Press - Elsevier, Anno edizione: 2012, ISBN: 9780123914217 https://www.elsevier.com/books/acoustics-sound-fields-and-transducers/mellow/978-0-12-391421-7
Risorsa bibliografica facoltativaGlen Ballou, HANDBOOK FOR SOUND ENGINEERS, Editore: Elsevier, Anno edizione: 2008, ISBN: 978-0-240-80758-4 https://www.sciencedirect.com/book/9780240809694/handbook-for-sound-engineers

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
30:00
45:00
Esercitazione
20:00
30:00
Laboratorio Informatico
0:00
0:00
Laboratorio Sperimentale
0:00
0:00
Laboratorio Di Progetto
0:00
0:00
Totale 50:00 75:00

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. 1.6.1 / 1.6.1
Area Servizi ICT
22/02/2020