Noise and Vibrations (FSI-IHV)

Academic year 2023/2024
Supervisor: prof. Ing. Jan Jedelský, Ph.D.  
Supervising institute: EÚ all courses guaranted by this institute
Teaching language: Czech
Aims of the course unit:
The aim of the course is to make students acquainted with problems caused by noise and vibrations so that they will be able to monitor the sound fields and vibrations, to measure relevant physical quantities and apply theoretical laws for their reduction. Acquiring basic knowledge about standards and regulation limits.
Learning outcomes and competences:
Knowledge of basic physical quantities for description of noise and vibrations in the working and living environment. Basic overview of standards and regulations concerning the measurement and evaluation of the noise and vibrations. Basic information about techniques for decreasing the noise and vibrations.
Prerequisites:
Oscillations. Simple harmonic motion. Superposition of harmonic oscillations. Waves. Types of waves: Longitudinal and transversal waves. Plane and spherical waves. Linear polarized waves. Superposition and interference of waves.
Course contents:
The following topics will be dealt with: Sources and sound propagation in closed and free areas. Monitoring and reduction of the noise in the living and working environment. Generation of vibrations, sensors and instruments for vibration measurement. Influence of the noise and vibrations to human health condition. Standards and limits. Practical acoustical measurements in common situations.
Teaching methods and criteria:
The course is taught through lectures explaining the basic principles and theory of the discipline. Teaching is suplemented by practical laboratory work.
Assesment methods and criteria linked to learning outcomes:
To receive a course-unit credit, a student has to attend all laboratory measurements and to hand over the reports. The exam has 2 parts: oral and written (theory and a solution of a problem).
Controlled participation in lessons:
A teacher checks the attendance in labs stated in the timetable. The form and the date of the compensation of missed lessons are specified by the teacher.
Type of course unit:
    Lecture  13 × 2 hrs. optionally                  
    Laboratory exercise  13 × 1 hrs. compulsory                  
Course curriculum:
    Lecture

Noise as a pollutant factor of the living and working environment. Sources of the noise.
Basic concepts and quantities. Sound field and its energy. Analysis of acoustic signals. 1/1 oct and 1/3 oct frequency analysis. Sound propagation in free space and closed area.
Sound field of several sources. Sound power. Directional emission. Noise of air-conditioning machines. Sound mufflers.
Noise reduction of machines. Absorption construction.
Instrument and rooms for measurement of the sound. Actual directives and limits for the noise.
Generation of the vibrations. Basic concepts and quantities of mechanical vibrations. Measurement of vibrations. Sensors and instruments. Diagnostics and monitoring of machines in operation. Measurement of the impact of the vibration on a human.
Methods for reducing vibrations.
Currentl directives and vibrations limits.


Software support in noise and vibration problems


noise and vibration of HVAC systems
    Laboratory exercise Measurement of the traffic noise.
Measurement of the acoustic power of the noise source.
Measurement of the sound isolation characteristics of the construction.
Analysis of the mechanical vibrations of the engine in dependence of operational revolutions.
Influence of the absorption layer on mechanical vibration transmission from noise source to installation pad.
Literature - fundamental:
3. Ver, I.L, Beranek, L.L.: Noise and Vibration Control Engineering: Principles and Applications, 2nd Edition. McGraw-Hill, Inc., 2005. ISBN: 978-0-471-44942-3
4. NOVÝ, Richard. Hluk a chvění. 3.vyd. Praha: Vydavatelství ČVUT, 2009, 389 s. ISBN 80-01-04347-9.
5. NOVÝ, Richard. Ventilátory. Vyd. 3., přeprac. V Praze: Nakladatelství ČVUT, 2007, 104 s. ISBN 978-80-01-03758-4.
7. BHATIA, A. Overview of Noise Control and HVAC Acoustic in Buildings. Vibrationdata [online]. [2012] [cit. 2014-04-11]. Dostupné z: http://www.vibrationdata.com/tutorials2/m206content.pdf
8. MIŠUN, V. Vibrace a hluk. Brno : Vysoké učení technické v Brně, Fakulta strojního inženýrství, 2005. ISBN 80-214-3060-5.
9. SZÉKYOVÁ, Marta, Karol FERSTL, Richard NOVÝ. Větrání a klimatizace. Bratislava: JAGA GROUP, s.r.o., 2006. 359 s. ISBN 80-8076-037-3.
Literature - recommended:
1. VAŇKOVÁ, Marie a kolektiv. Hluk, vibrace a ionizující záření v životním a pracovním prostředí část I. 1.vyd. Brno: PC-DIR, spol. s.r.o., 1995. 140 s. ISBN 80-214-0695-X.
2. VAŇKOVÁ, Marie a kolektiv. Hluk, vibrace a ionizující záření v životním a pracovním prostředí část II. 1.vyd. Brno: PC-DIR, spol. s.r.o., 1996. 161 s. ISBN 80-214-0818-9.
3. SMETANA, Ctirad, et al. Hluk a vibrace: Měření a hodnocení. 1. Vydání. Praha 1: Sdělovací technika, 1998. 188 s. ISBN 80-901936-2-5.
The study programmes with the given course:
Programme Study form Branch Spec. Final classification   Course-unit credits     Obligation     Level     Year     Semester  
N-ETI-P full-time study TEP Environmental Engineering -- Cr,Ex 4 Compulsory 2 2 W