Course detail

Room Acoustics

FAST-CH052Acad. year: 2024/2025

The acoustic theory of an enclosed space. Direct and reflected sound wave field. Acoustic comfort criteria for buildings. Noise characteristics in the room acoustics, noise and vibration. Basic calculations of noise reduction, ways of noise reduction. Noise measuring instruments, measuring methods in the room acoustics.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

prof. Ing. Jitka Mohelníková, Ph.D.

Department

Institute of Building Structures (PST)

Entry knowledge

Fundamentals of architectural acoustics.

Rules for evaluation and completion of the course

Final evaluation on basis of consulted and completed reports and passed exam. Classification according to ECTS degree at the BUT Brno.


Extent and forms are specified by guarantor’s regulation updated for every academic year.

Aims

To get a complete and detailed understanding of all acoustics topics. Solving the issue of noise at working places, noise study designs and noise reduction in a communal space. Designing in a field of room acoustics, an option of suitable absorptive materials.
Knowledge of room acoustics, properties of materials and surfaces (absorption, reverberance, resistance), design with respect to standards and regulations, which include the solution of minor and major problems of noise levels in working spaces and civil buildings.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Not applicable.

Recommended reading

Not applicable.

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

prof. Ing. Jitka Mohelníková, Ph.D.

Syllabus

1. Sound field in an enclosed space, field of direct and reflected sound waves. Uniform distribution of sound pressure levels in rooms. Requirements for room acoustics - speech intelligibility, optimal reverberation time, diffusive sound field. Acoustics wave, geometric and statistical theory. Design of optimal size and shape of the room in accordance with the theory of wave and geometric acoustics. 2. Materials and components for room acoustics. Evaluation of reverberation time in terms of speech intelligibility, design modifications, detailed solution. 3. Room acoustics measurement methodology. 4. Room simulations in software ODEON. 5. Sound insulating properties of building constructions - principle of sound wave propagation, requirements for sound insulation. Measurement methodology for sound insulation properties of building constructions and elements. 6. Design methods and evaluation of building constructions in terms of sound insulation. Single and multi-layer constructions, internal and external building constructions. Materials and components for air-borne and impact sound insulation in vertical and horizontal constructions, detail solution. 7. Urban sound field, the noise sources in the outdoors, CZ Government Regulation No. 272/2011, about health protection against harmful effects of noise and vibration. 8. Methodology for evaluation of noise from traffic, simulation model, measurement methodology. 9. The evaluation methodology of stationary noise sources, calculation procedure. 10. Noise reduction requirements and solutions, urban and room acoustics levels, detail solutions.

Exercise

26 hod., compulsory

Teacher / Lecturer

prof. Ing. Jitka Mohelníková, Ph.D.

Syllabus

1. Measurement of reverberation selected classrooms according to requirements of room acoustics. 2. Design of classroom modifications on the basis of the acoustic measurements, optimization of sound absorptive materials and their application in the room, detail solutions. Assessment of the reverberation time - calculation method of reverberation time in terms of speech intelligibility. 3. Laboratory measurement of sound absorption coefficient of selected porous sound absorptive materials, datasheet from measurements. 4. – 5. Simulation of the classroom model and its verification, software ODEON. 6. Measurements of airborne and impact sound insulation of a floor structure in situ. Evaluation and verification of the measured construction. 7. Design of noise protections and modifications, detail solutions. 8. Optimal design of building constructions in terms of sound insulation - calculation procedures for the newly design building project documentation. 9. Measurement of noise from traffic, noise report. 10. Noise report according to applicable methodologies.