Acoustic and Instrumentation II

It is a preferred condition for the frequency of this UC a fundamental knowledge of wave physics, as well as instrumentation and signal processing, treated in the following UCs: Physics and Acoustics and Instrumentation I.

The theoretical exposure with interaction of the students will allow to enhance the practical component in the resolution of exercises.

UC provides for a strong practical component of program development in MATLAB involving the acquisition and treatment of audio signals, as well as the use of digital audio editing tools (e.g. Audacity).

The completion of this curricular unit will allow students to:

– Assimilate the general concepts of electronics and electroacoustics applicable to the area of audiology;

– Assimilate the general concepts of building acoustics;

– Classify, distinguish and characterize the different types of transducers;

– Assimilate the basic principles of analog signal processing;

– Characterize and identify the main components of the equipment;

– Identify calibration equipment; Distinguish the different maintenance and calibration procedures of audiometric equipment and their standards;

– Describe the properties of signals in the domain of time and frequencies and explain the relationship between these descriptions;

– Know and apply the fundamentals of digital signal processing to sound analysis, including speech sounds;

– Introduction and general concepts: definition of sound, frequency, period, wavelength, speed of sound, intensity, power and sound pressure decibel and Doppler effect,. 

– Propagation of sound and acoustics of buildings: the law of the square of the distances, reflection, refraction, diffraction, reverberation and Sabine formula and absorption coefficients. 

– Transducers: general description, classification, electromechanical principles, characteristics and dynamic performances. 

– Amplifiers: harmonica and intermodal distortion, amplification simplified system limitation – feedback, maximum acoustic gain. 

– Major components of equipment: audiometers, impedancímetros, otoacoustic emissions, evoked powers. (4 Hours)

 – calibrations, maintenance and standards: equipment calibration, maintenance procedures and standards applied

– Signal processing with the use of software tools. 

– Creation of auditory digital stimuli 

NAO

Main bibliography:

1. ACOUSTICS FOR AUDIOLOGISTS, BY PETER HAUGHTON, PUBLISHER: ACADEMIC PRESS; 1ST EDITION (MAY 10, 2002), ISBN-10: 0123329221, ISBN-13: 978-0123329226

2. FUNDAMENTALS OF HEARING, FIFTH EDITION: AN INTRODUCTION,BY WILLIAM A. YOS,PUBLISHER: EMERALD GROUP PUBLISHING LIMITED; 5 EDITION (OCTOBER 2, 2006), ISBN-10: 0123704731, ISBN-13: 978-0123704733

Complementary bibliography:

1. INSTRUMENTATION: AN INTRODUCTION FOR STUDENTS IN THE SPEECH AND HEARING SCIENCES, BY T. NEWELL DECKER; PUBLISHER: PSYCHOLOGY PRESS; 3 EDITION (12 FEB 2004), ISBN-10: 0805846816, ISBN-13: 978-0805846812

2. HANDBOOK OF SIGNAL PROCESSING IN ACOUSTICS, VOL 1 E VOL 2, BY DAVID HAVELOCK (EDITOR), SONOKO KUWANO (EDITOR), MICHAEL VORLÄNDER (EDITOR), PUBLISHER: SPRINGER; 1 EDITION (JANUARY 22, 2009), ISBN-10: 0387776982, ISBN-13: 978-0387776989

3. ESSENTIALS OF AUDIOLOGY, BY STANLEY GELFAND (AUTHOR), PUBLISHER: THIEME NEW YORK; 3 EDITION (MARCH 19, 2009), ISBN-10: 1604060441, ISBN-13: 978-1604060447