Czech

6

Not applicable.

On completion of the course, students are able to:
- explain sound propagation in enclosed space,
- measure the reverberation time and the impulse characteristic of the space,
- calculate objective criteria for the quality assessment of listening spaces,
- design basic absorption and diffusion elements to adjust the reverberation time of listening spaces,
- create a simulation of the distribution of sound pressure using geometric and numerical methods,
- propose solutions for acoustic modifications of newly realized and existing listening spaces.

The knowledge of basic physical laws and quantities of the sound field is required as well as the knowledge of laws and quantities in electrical circuits, characteristics of electric circuit elements, circuit behaviour with inertia elements, fundamentals of electro-mechanic and electro-acoustics analogy, periodical and non-periodical signal spectra, random variables and basic terms from the area of statistics

Not applicable.

Teaching methods depend on the type of course unit as specified in article 7 of the BUT Rules for Studies and Examinations.
- Lectures provide explanations of the basic principles, subject methodology, examples of problems and their solutions.
- Laboratory exercises support practical mastering of the themes presented in lectures. Active participation of students is required.
Participation in lectures is recommended. Participation in other ways of instruction is checked.

Evaluation of study results follow the BUT Rules for Studies and Examinations and Dean's Regulation complementing the BUT Rules for Studies and Examinations. Up to 40 points can be obtained for elaboration of projects in laboratory exercises. The minimal scope of the elaboration of projects are specified by a regulation issued by the guarantor of the course and updated for every academic year. Up to 60 points are given for the final examination, and it is necessary to get at least 20 points for its successful completion.

1. Wave acoustics: wave equation for plane waves in an enclosed space, space modes, critical frequency, recommended aspect ratios of rooms, numerical methods for solving the wave equation in an enclosed space
2. Geometric acoustics: attenuation of sound waves during propagation through the environment, specular and diffuse reflection, diffraction, absorption, reflection and diffuse reflection coefficient, auralization, image method, ray-tracing and beam-tracing method
3. Statistical acoustics: sound energy density, reverberation time, methods of measuring reverberation time, requirements for measuring reverberation time according to ČSN EN ISO 3382, requirements for reverberation time according to ČSN 73 0526 and ČSN 73 0527
4. Impulse response of space: ETC and EDC curves, echogram, EDR, objective criteria of acoustic space quality, classification of acoustic quality of concert halls, speech intelligibility, evaluation of speech intelligibility using speech transmission index according to IEC 60268-16, indirect STI measurement method
5. Measurement of room impulse response: measurement of monaural and binaural responses, measurement methods (continuous frequency sweep, MLS, dual FFT), averaging of measurement and smoothing of frequency response, compensation of measuring system characteristics
6. Absorption elements: sound absorption factor, electroacoustic analogy, porous materials, elements based on the resonant principle
7. Reflective and diffuse elements: spatial and temporal dispersion of waves, scattering factor and directional diffusion factor, flat panels, triangular elements, arcs and optimized curved surfaces, Schröder diffusers
8. Measurement of acoustic elements parameters: measurement of sound absorption factor in interferometer (standing wave ratio method and transfer function method), measurement of sound absorption factor and scattering factor in reverberation room, measurement of directional diffusion factor in free field
9. Sound insulation of the room: hygienic noise limits, evaluation of background noise, noise propagation between rooms, laboratory and building air and impact soundproofing and their measurement, frequency domains of the oscillating plate, sound insulation structures
10. Design of room acoustics: LEDE recording studios, listening rooms, soundproof cabins, commercial spaces, verification of room acoustics using a 3D model
11. Modern methods in room acoustics: active absorbers, hybrid acoustic impedance, passive and active systems of variable room acoustics, time-space analysis of room impulse response, acoustic studies with virtual orchestra
12. Professional lecture - a case study of the solution of acoustics of commercial space
13. Professional lecture - a case study of the solution of acoustics of space for music performance

Not applicable.

The aim of the course is to acquaint students with methods of analysis of sound propagation in an enclosed space, measurement of listening room parameters, design and measurement of acoustic elements and with modern technologies used for acoustic space adjustment and its analysis.

It is obligatory to undergo all laboratory exercises in regular or alternative terms to complete the course. Other forms of checked instruction are specified by a regulation issued by the guarantor of the course and updated for every academic year.

Not applicable.

Not applicable.

KUTTRUFF, H.. Room acoustics. 6th ed. Boca Raton: CRC Press, 2017, 302 s. ISBN 978-1-4822-6043-4 (CS)
KOLMER, F., KYNCL, J. Prostorová akustika. 2, vyd. Praha: Státní nakladatelství technické literatury, 1982, 242 s., ISBN 0451480 (CS)
Everest, F. ,A. ,Master Handbook of Acoustics, 4th ed. McGraw-Hill, 2001. ISBN 0-07-136097-2 (EN)
Cox, T., J., D‘Antonio, P., Acoustics Absorbers and Diffusers, Theory, design and application, 2nd ed. Taylor&Francis, 2009. ISBN 978-0-415-47174-5 (EN)

Not applicable.

eLearning: currently opened course

39 hours, compulsory

eLearning: currently opened course