Measurement of Acoustical Quantities

Lecturer:

Tutor:

Supervisor:

Department of Radioelectronics

Synopsis:

This subject deals with measurement of basic acoustic quantities used in communications in both lectures and labs. Transducer calibration methods and means are analysed and main measuring methods are presented. The above mentioned methods and tools are described in detail within the audiology and architectural acoustics as well. Very interesting measurement based on utilizing of artifical head is also described.

Requirements:

Syllabus of lectures:

1. Basic acoustic quantities and their definition

2. Measurement of acoustic and mechanic impedances

3. Acoustic interferometer. Measurement of absorption coefficient

4. Measuring microphone, description, characteristics and usage

5. Measurement of acoustic pressure

6. Calibration using pistonphone, electrostatic method

7. Reciprocity calibration method

8. Reciprocity in the difussion field, in the spherical wave

9. Measurement of intensity and power

10. Artificial ear, artificial mouth, artificial head, artificial mastoid

11. Measurement in audiology, Telephonometry

12. Reverberation room, anechoic room. Measurement of loudspeakers

13. Measurement of noise and vibrations

14. Measurement in architectural acoustics, reverberation time

Syllabus of tutorials:

1. Calibration of measuring microphones by electrostatic method

2. Calibration of measuring microphones by pistonphon

3. Calibration by reciprocity method. Calibration in the field of travelling spherical wave

4. Measurement on artificial ear, artificial mastoid

5. Measurement of the reverberation time

6. Interpherometer - measurement of specific impedance

7. Measurement of the absorption coefficient

8. Audiometry measurement

9. Measurement of vibrations in solid state

10. Measurement of loudspeaker sensitivity. MLSSA and pulse methods

11. Design of a measuring microphone

12. Acoustic power radiated into the liquid, acoustic cavitation measurement

13. Problems from room acoustics

14. Credit

Study Objective:

Study materials:

1. Rossi, M. Acoustics and Electroacoustics. Norwood: Artech House, Inc. 1988

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Telecommunications and Radio-engineering - High-frequency and Microwave Technology- structured studi (compulsory elective course)
• Telecommunications and Radio-engineering - Opto-electric Systems- structured studies (compulsory elective course)
• Telecommunications and Radio-engineering - Radio Communications, Navigation and Radar Systems- struc (compulsory elective course)
• Telecommunications and Radio-engineering - Multimedia, Sound and Television Technology- structured s (compulsory elective course)
• Telecommunications and Radio-engineering - Telecommunications- structured studies (compulsory elective course)