Course Details

Room Acoustics

Academic Year 2023/24

NHB051 course is part of 1 study plan

​ NPC-SIS Winter Semester 2nd year

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

Course Guarantor

prof. Ing. Jitka Mohelníková, Ph.D.

Institute

Institute of Building Structures

Objective

General overview of the building acoustics topics. Evaluation of noise at working places, noise reports and study of noise reduction in municipal areas. Designing in a field of room acoustics, selection of convenient sound absorptive materials.

Knowledge

Fundamentals in building acoustics, in the field of noise in work places, noise reports and study of noise reduction in municipal areas. Room acoustics evaluations and sound absorptive materials.

 

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.

Prerequisites

Fundamentals of architectural acoustics.

Language of instruction

Czech

Credits

5 credits

Semester

winter

Forms and criteria of assessment

course-unit credit and examination

Specification of controlled instruction, the form of instruction, and the form of compensation of the absences

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

Offered to foreign students

Not to offer

Course on BUT site

https://www.vut.cz/en/students/courses/detail/271289

Lecture

13 weeks, 2 hours/week, elective

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

13 weeks, 2 hours/week, compulsory

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.