Course detail
Electroacoustics
FEKT-BPA-ELAAcad. year: 2023/2024
Acoustic environment, sound propagation, basic quantities and relations, energy transmitted by sound. Physiological acoustics, sound masking and its utilization in compression algorithms, directional and spatial hearing. Noise and its measurement. Room acoustics, room impulse response. Electromechanical and electro-acoustic analogy, acoustic materials and structures. Types and operation principles of electro-acoustic transducers. Microphones, practical design and measurement of characteristics. Loudspeakers, acoustic impedance and distortion, mechanical design, horn-loaded loudspeakers, headphones. Loudspeaker systems, types of loudspeaker enclosures, design and construction of loudspeaker systems and crossovers. Multichannel audio systems, basics of sound reinforcement. Stereo and multichannel techniques of sound pickup.
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Department
Entry knowledge
The student who enrols the subject should be able to use instruments for measurement of electrical voltage, current, and resonant frequency, waveform generators and oscilloscopes.
Rules for evaluation and completion of the course
It is mandatory to pass all laboratory exercises in regular or alternative terms to complete the course. Other forms of the checked instructions are specified by a regulation issued by the guarantee of the course and updated for every academic year.
Aims
Graduate of the course is able to:
- name basic acoustic quantities and their units,
- explain physiology of hearing including binaural auditory perception,
- employ sound level meters and use them for noise and electroacoustic measurements,
- describe room acoustic properties, demonstrate measurement of room impulse response and reverberation time, name materials and structures used for room acoustic treatment,
- categorize electroacoustic transducers and state their principles, properties and their use,
- categorize microphones, state their properties and designs, and demonstrate measurement of their characteristics,
- describe properties of designs used for unloaded and loaded loudspeakers, measure and calculate their parameters,
- design loudspeaker systems and measure their characteristics,
- name types of surround sound systems and describe their principle,
- name methods of multichannel sound pickup and explain their principles.
Study aids
Prerequisites and corequisites
Basic literature
SCHIMMEL, J. Electroacoustics - Laboratory Practices. Brno, VUT v Brně. 2015. p. 1 - 59. SCHIMMEL, J. Electroacoustics. Electroacoustics. Brno, VUT v Brně. 2015. p. 1 - 120. ISBN 978-80-214-5030-1.
SCHIMMEL, J. Electroacoustics. Brno, Brno university of Technology. 2015. p. 1 - 120. ISBN978-80-214-5030-1.
Streicher, R., Everest, F., A. The New Stereo Soundbook, 3rd ed. Audio Engineering Associates, 2006. ISBN 978-0-9665162-1-0 (EN)
Recommended reading
Classification of course in study plans
Type of course unit
Lecture
Teacher / Lecturer
Syllabus
Energy transmitted by sound, sound spectrum, Doppler principle, acoustic impedance.
Physiological acoustics, subjective and objective characteristics of sound, sound masking and its utilization in audio compression algorithms.
Directional and spatial hearing, 3D room simulation using headphones and loudspeakers.
Noise and its measurement, basic measuring instruments for electroacoustic measurement and their application.
Room acoustics, acoustic wave trajectory, room impulse response, acoustic materials.
Electromechanical and electroacoustic analogy.
Types and operation principles of electroacoustic transducers.
Classical and combined types of microphones, practical design and measurement of characteristics.
Loudspeakers and headphones, acoustic impedance and distortion, mechanical design, horn-loaded loudspeakers.
Loudspeaker systems, types of loudspeaker enclosures, design and construction of loudspeaker enclosures and crossovers, acoustic lenses.
Surround sound systems principles and formats.
Stereo and multichannel techniques of sound pickup.
Laboratory exercise
Teacher / Lecturer
Syllabus
Sound signal spectrum
Measurement of ear's own characteristics
Noise measurement and its evaluation
Room acoustics measurement
Measurement of binaural hearing characteristics
Test and compensatory practice
Measuring the frequency response of microphones
Measuring the impedance characteristic of loudspeakers
Design and simulation of loudspeaker system
Measuring the frequency and directional response of loudspeaker system
Measurement of acoustic intensity and power radiated by object
Test and compensatory practice