Sound and Environment

Course Description

The goal of the subject is to familiarize the students with the influence the sound has on the environment and on people who live and work in the vicinity of sound sources. Acoustic emission. Influence of noise and vibrations to man. Time and spectral characteristics of noise. Parameters used for evaluation of effects the noise has on people. Noise measurement procedures and methods. Sound level meter. Spectrum analyzer. Noise evaluation methods. Measures and means of protection from noise, vibrations and impacts. Noise maps. Soundscapes. Sound quality. Standards, regulations and recommendations.

General Competencies

Good understanding of the problems and solutions of sound insulation and noise protection, with applications to human environment. Good understanding of principles and methods in noise and vibration control used for residental buildings. Theoretical and practical knowledge about methods and techniques in noise measurements.

Learning Outcomes

  1. evaluate the indicators of the interaction between sound sources and the surrounding, i.e. sound pressure, intensity and power
  2. explain the origin of mechanical vibrations and basic principles of vibration insulation
  3. operate a sound level meter and an accelerometer for measuring sound and vibration levels
  4. predict the influence of excess noise and vibration levels on human
  5. compare needed measures for indoor and outdoor noise protection based on requirements
  6. differentiate elements of interior acoustical design and sound insulation elements
  7. interpret noise maps for evaluation of imission levels based on noise indicators
  8. apply noise protection laws and regulations when evaluating the imssion levels

Forms of Teaching

Lectures

Lectures are held in 2 terms, 3 hours per week. Short exams and solving of numerical examples will be integrated into the lectures.

Exams

During the lectures, short tests on comprehension of the adopted knowledge will be held. Also a mid-term and final exam will be held.

Laboratory Work

6 laboratory exercises will be organized that follow the contents of the lectures.

Grading Method

   
By decision of the Faculty Council, in the academic year 2019/2020. the midterm exams are cancelled and the points assigned to that component are transferred to the final exam, unless the teachers have reassigned the points and the grading components differently. See the news for each course for information on knowledge rating.
   
Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Laboratory Exercises 0 % 20 % 0 % 0 %
Quizzes 0 % 10 % 0 % 0 %
Mid Term Exam: Written 0 % 35 % 0 %
Final Exam: Written 0 % 35 %
Exam: Written 0 % 50 %
Exam: Oral 50 %

Week by Week Schedule

  1. Introduction. Sound and vibration basics. Noise.
  2. Wave equation of sound. Acoustic quantities. Levels. Sound fields and sources.
  3. Sound analysis - time and frequency domain. Filters.
  4. Sound measurement. Measurement microphone. Sound level meter.
  5. Mechanical vibrations. Single/multi degree of freedom systems. Vibration insulation.
  6. Vibration measurement and analysis. Accelerometer.
  7. Noise and vibration influence on human.
  8. Mid-term exam
  9. Sound intensity. Sound power.
  10. Noise protection measures 1 - indoors.
  11. Noise protection measures 2 - outdoors.
  12. Noise maps. Soundscape. Sound quality.
  13. Norms and laws in the field of sound and vibration in Croatia.
  14. Solving integral problems in the field of sound and vibration.
  15. Final exam

Study Programmes

University undergraduate
Electronics (module)
Elective Courses (6. semester)

Literature

David A. Bies, Colin H. Hansen (2009.), Engineering Noise Control, Theory and Practice, Spon Press
Michael Möser (2009.), Engineering Acoustics, An Introduction to Noise Control, Springer
Frank Fahy, John Walker (2004.), Advanced Applications in Acoustics, Noise & Vibration, Spon Press

Laboratory exercises