Electroacoustics

Course guarantor:

Lecturer:

Tutor:

Supervisor:

Department of Radioelectronics

Synopsis:

The course introduces the principles of electroacoustic and electromechanical transducers from the perspective of physicas background and technological solutions. It also focuses on methods of analysis of transducers and electroacoustic systems. The main topics are acoustic transmitters (speakers, actuators) and acoustic receivers (microphones, sensors) and the principles of electroacoustic conversion used in them, as well as related electrical and acoustic systems (crossovers, baffles, waveguides) and, last but not least, measurement and calibration.

Requirements:

Students should master knowledge of maths, physics, signal theory and electric circuits theory at the bachelor state exam level.

Syllabus of lectures:

1. Electromechanical and electroacoustic analogy

2. Modeling of vibrating systems with distributed parameters (membranes)

3. Acoustic transmitters

4. Electromechanical transducers with a magnetic field

5. Electroacoustic transducers with an electric field

6. Acoustic receivers (microphones, measuring microphones, sensors)

7. Loudspeakers, baffles, crossovers

8. Electroacoustic headphones

9. Numerical methods for optimizing electroacoustic transducers

10. Electroacoustic measurements - calibration

11. Acoustic and mechanical waveguides

12. MEMS transducers and their communication formats

13. Nonlinearities of electroacoustic transducers and their measurements

14. Lecture by a guest professor

Syllabus of tutorials:

1. Úvod, elektroakustické analogie - výpočty

2. Kmitající soustavy - výpočty

3. Vyzařování kmitajících soustav - výpočty

4. Laboratorní úloha - Measurement of electrodynamic loudspeaker parameters

5. Laboratorní úloha - Electrostatic calibration

6. Laboratorní úloha - Calibration of earphones on the artificial ear

7. Laboratorní úloha - reproduktorové výhybky

8. Laboratorní úloha - měření kmitání měničů laserovým vibrometrem

9. Směrová funkce mikrofonu

10. Praktické použití numerických metod (FEM)

11. Vlnovody - simulace

12. MEMS měniče -praktické aspekty

13. Měření nelinearit měničů - sweepsine

14. Zápočet

Study Objective:

The course is aimed at fundamental knowledge in electroacoustics.

Study materials:

Recommended literature:

[1] Kleiner, M.: Electroacoustics, CRC Press, 2013

[2] Rossi, M.: Acoustics and Electroacoustics, Artech House, 1986

Lecture materials in Moodle and materials for laboratory assignments.

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Communications and Internet of Things - Audiovisual Technology (compulsory elective course)
• Electronics and Integrated Systems (compulsory elective course)