Course detail

Room acoustics (S-PST)

FAST-CH52Acad. year: 2012/2013

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)

Learning outcomes of the course unit

knowledge overview of all acoustic fields. The issue of noise in the work environment, noise studies and noise reduction in municipal buildings. Basic knowledge of architectural acoustics including sound absorbing materials.

Prerequisites

Sound sources, sound wave terminology, physical parameters of sound, sound field quantities.

Co-requisites

Fundamentals of building acoustics, subject CH01.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Completed and revised reports, attendance, on-going work during the practices, passing written and oral exams.

Course curriculum

1. The government ordinance about health protection against adverse noise effects and vibrations no.148/2006 Col.
2. Acoustic quality criteria of enclosed spaces - voice intelligibility, optimal reverberation time, diffusion of the sound field.
3.-4. Direct and reflected sonic wave field. Even distribution of sound pressure levels in a space.
5.-6. A design of optimal dimensions and space shapes based on the calculation of natural vibration density
7. Wave, geometrical and statistical acoustics.
8.-9. The real assessment of a classroom and its reverberation time calculation from the point of view to ensure the speech quality including classroom adjustments
10. Traffic noise measurement, noise study.
11. Evaluation nois of the programme HLUK+.
12.- 13. Verification of calculations by a device measurement according to the methodical instructions for measurements and evaluations in the field of building acoustics

Work placements

-

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.

Specification of controlled education, way of implementation and compensation for absences

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

Recommended optional programme components

Study of technical literature, participation in seminars and conferences.

Prerequisites and corequisites

Not applicable.

Basic literature

ČSN ISO 3382. 1999. (CS)
ČSN 73 05 25 Akustika – Projektování v oboru prostorové akustiky – Všeobecné zásady. 0. (CS)
ČSN 73 0525 Akustika – Projektování v oboru prostorové akustiky – Všeobecné zásady. 0. (CS)
Donaťáková,D., Berka,P.: Akustika-Návody pro cvičení. CERM Brno, 2001. (CS)
Lukašík a kol.: Akustika a denní osvětlení v pozemním stavitelství. ES VUT, 1989. (CS)
Maekawa, Lord: Environmental and Architectural Actoustics. EaFN, 1992. (EN)
Nařízení vlády č.148/2006 Sb. o ochraně zdraví před nepříznivými vlivy hluku a vibrací. 2006. (CS)
Vaverka a kol.: Urbanistická stavební a prostorová akustika. VUT Brno, 1998. (CS)

Recommended reading

Čechura,J.: Akustika stavebních konstrukcí. ČVUT Praha, 1999. (CS)
FICKER, Tomáš: Handbook of Building Thermal Technology, Acoustics and Daylighting. CERM, 2004. ISBN 80-214-2670-5. (EN)
Halahyja,M.: Stavební tepelná technika, akustika a osvětlení. ALFA, SNTL, 1985. (CS)

Classification of course in study plans

  • Programme N-K-C-SI Master's

    branch S , 1 year of study, summer semester, elective

  • Programme N-P-C-SI Master's

    branch S , 1 year of study, summer semester, elective

  • Programme N-P-E-SI Master's

    branch S , 1 year of study, summer semester, elective

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.
2. 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.
3. Materials and components for room acoustics. Evaluation of reverberation time in terms of speech intelligibility, design modifications, detailed solution.
4. Room acoustics measurement methodology.
5. Room simulations in software ODEON.
6. Sound insulating properties of building constructions - principle of sound wave propagation, requirements for sound insulation.
7. Measurement methodology for sound insulation properties of building constructions and elements.
8. Design methods and evaluation of building constructions in terms of sound insulation. Single and multi-layer constructions, internal and external building constructions.
9. Materials and components for air-borne and impact sound insulation in vertical and horizontal constructions, detail solution.
10. 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.
11. Methodology for evaluation of noise from traffic, simulation model, measurement methodology.
12. The evaluation methodology of stationary noise sources, calculation procedure.
13. 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.
3. Assessment of the reverberation time - calculation method of reverberation time in terms of speech intelligibility.
4. Laboratory measurement of sound absorption coefficient of selected porous sound absorptive materials, datasheet from measurements.
5. – 6. Simulation of the classroom model and its verification, software ODEON.
7. Measurements of airborne and impact sound insulation of a floor structure in situ.
8. Evaluation and verification of the measured construction.
9. Design of noise protections and modifications, detail solutions.
10. Optimal design of building constructions in terms of sound insulation - calculation procedures for the newly design building project documentation.
11. Measurement of noise from traffic, noise report.
12. – 13. Noise report according to applicable methodologies.