### Electroacoustics 1

#### Course Description

Students will be able to understand basic terms of acoustics and electroacoustics. Define parameters of acoustic fields. Basic constitutive equations. Wave equation. Outdoor sound. Losses and their influence on sound propagation. Plane, sphere and cylindrical waves. Harmonic and other excitation. Infrasound and ultrasound. Hearing system. Binaural hearing. Sound in closed spaces. Architectural acoustics. Acoustic elements-reflectors, diffusors, resonators. Soundscape. Identification and characterization of sound sources.

#### Learning Outcomes

1. Define basic parameters of acoustic field
2. Express relations between acoustic parameters
3. Estimate the influence of sound on environment
4. Analyze acoustic parameters
5. Choose optimal solution for acoustic parameters improvement
6. Describe the hearing system
7. Identify frequency content of soud source
8. Explain effects on sound propagation outdoors
9. Identify acoustic elements.

#### Forms of Teaching

Lectures

Basic theoretical knowledge

Exercises

Solving numerical problems.

Field work

Environmental noise acoustic measurements

Laboratory

Practial problems during acoustic measurements

Continuous Assessment Exam
Laboratory Exercises 50 % 20 % 50 % 20 %
Seminar/Project 50 % 10 % 50 % 10 %
Mid Term Exam: Written 0 % 20 % 0 %
Final Exam: Written 0 % 20 %
Final Exam: Oral 30 %
Exam: Written 50 % 40 %
Exam: Oral 30 %

#### Week by Week Schedule

1. Sound wave propagation phenomena; Reflection and standing wave; Absorption; Diffraction; Refraction; Diffusion
2. Pressure; Displacement; Particle velocity; Intensity; Power, Levels of sound pressure, intensity and power; Decibel
3. Expression of state, movement and continuity, Wave equation, Influence of viscosity and other dissipative effects on sound wave propagation
4. Fundamentals of harmonic oscillation, Plane wave, Point sound sources, Line and area sound sources
5. Infrasound perception, Infrasound propagation in different media, Infrasound intensity measurement; Protection from infrasound, Characteristics of ultrasound, Ultrasound transducers technology
6. Hearing physiology
7. Basics of binaural hearing
8. Midterm exam
9. Functional parts of the hearing system
10. Development of architectural acoustics
11. Sound waves in spaces
12. Reflectors, Absorbers, Diffusors
13. Soundscape term, In-situ and laboratory analysis
14. Sound source identification; Microphone arrays, Soundscape parameters
15. Final exam

#### Study Programmes

Free Elective Courses (5. semester)
Free Elective Courses (5. semester)
[FER2-HR] Electronics - module
Specialization courses (5. semester)
[FER3-HR] Audio Technologies and Electroacoustics - profile
Core-elective courses (1. semester)
[FER3-HR] Communication and Space Technologies - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Computational Modelling in Engineering - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Computer Engineering - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Computer Science - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Control Systems and Robotics - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Data Science - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Electrical Power Engineering - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Electric Machines, Drives and Automation - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Electronic and Computer Engineering - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Electronics - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Information and Communication Engineering - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Network Science - profile
Elective Courses (1. semester) (3. semester)
[FER3-HR] Software Engineering and Information Systems - profile
Elective Courses (1. semester) (3. semester)

#### Literature

Tihomil Jelaković (1978.), Zvuk, sluh, arhitektonska akustika,
John A. Kleppe (1989.), Engineering Applications of Acoustics, Artech House on Demand
Heinrich Kuttruff (2016.), Room Acoustics, Sixth Edition, CRC Press
Allan D. Pierce (2019.), Acoustics, Springer

#### General

ID 183430
Winter semester
5 ECTS
L2 English Level
L2 e-Learning
45 Lectures
0 Seminar
15 Exercises
10 Laboratory exercises
0 Project laboratory