Předmět Electroacoustics (FEKT-CELA)

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Materiál	Typ	Datum	Počet stažení

Cíl

The aim of the course is to make students familiar with the chain of processing acoustic signals from their origination through their transformation into electric signals and back to acoustic signals up to the listener's final perception.

Osnova

1. Acoustic environment, basic quantities and relations, wave equation of sound propagation, energy transmitted by sound, sound spectrum. Types of acoustic fields.2. Physiological acoustics, subjective and objective properties of sound, sound masking and its utilization in audio compression algorithms. 3. Directional and spatial hearing, 3D room simulation using headphones and loudspeakers.4. Noise and its measurement, noise classes, loudness measurement according to Steven's and Zwicker's models.5. Sound level meters, analyzers for electroacoustic measurements, calibration of measurement chain. Measurement of acoustic power and sound intensity.6. Basics of room acoustics, geometric, wave and statistic models, room impulse response, measurement of reverberation time, objective parameters of listening rooms.7. Electromechanical and electro-acoustic analogy, acoustic materials and structures. 8. Electro-acoustic transducer as the system, types and operation principles of transducers. 9. Gradient microphones, wave and combined microphones, design and measurement of characteristics. 10. Loudspeakers, acoustic impedance and distortion, mechanical design, horn-loaded loudspeakers. Types and design of headphones, measurement of characteristics.11. Loudspeaker systems, types of loudspeaker enclosures, design and construction of loudspeaker enclosures and crossovers. Acoustic lenses.12. Multichannel sound reproduction, basics of sound reinforcement.13. Stereo and multichannel techniques of sound pickup.

Literatura

SCHIMMEL, J. Electroacoustics. Brno, Brno university of Technology. 2015. p. 1 - 120. ISBN978-80-214-5030-1. 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. Benson, K., B. Audio Engineering Handbook. McGraw-Hill, 1988. ISBN 0-07-004777-4 (EN)Streicher, R., Everest, F., A. The New Stereo Soundbook, 3rd ed. Audio Engineering Associates, 2006. ISBN 978-0-9665162-1-0 (EN)Zwicker, E., Fastl, H. Psychoacoustics, Facts and Models, 2nd ed. Springer-Verlag, 1999. ISBN 3-540-65063-6 (EN)Rumsey, F. Spatial Audio. Focal Press, 2001. ISBN 0-240-51623-0 (EN)Blauert, J. Spatial Hearing, The Psychophysics of Human Sound Localization. The MIT Press, 1997. ISBN 0-262-02413-6 (EN)Colloms, M., High Performance Loudspeakers, 6th ed. John Wiley & Sons, Ltd, 2005. ISBN 978-0-470094-30-3 (EN)

Požadavky

The knowledge of basic physical laws is required as well as knowledge of laws and quantities in electrical circuits, characteristics of electric circuit elements, circuit behaviour with inertia elements, periodical and non-periodical signal spectrum, random variables and basic terms from area of statistics.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.

Garant

Ing. Jiří Schimmel, Ph.D.

Vyučující

Ing. Jiří Schimmel, Ph.D.