Measurements for Audio and Acoustics
FEKT-MPC-AMAAcad. year: 2020/2021
The subject is focused on automation measurements in the field of audio engineering, electroacoustics, acoustics and noise according to international recommendations in these fields. Laboratory practices are focused on the independent creation of projects for the automated measurement of audio equipment, electroacoustic devices, room acoustics and noise in various industrial measuring systems, bulk processing of measured data, especially using spreadsheet editor and Matlab, and implementation of functions in VBA and C ++ for Integration of measurement in own software.
Learning outcomes of the course unit
- use the correct method for automated measurement of a given quantity,
On completion of the course, students are able to:
- create an automated measurement project for typical applications in acoustics, electroacoustics and audio engineering,
- perform bulk processing of measured data using a spreadsheet editor,
- create and edit macros in the VBA for bulk processing of measured data,
- create functions in C and VBA for remote control of automated measurement systems.
Knowledge of principles and control of instruments for measuring voltage, current and frequency, knowledge of the operation of digital generators, oscilloscopes and spectral analyzers, knowledge of principles of measurement of current, voltage, frequency, impedance and total harmonic distortion, knowledge of C language and work with spreadsheet editor are required.
Recommended optional programme components
Recommended or required reading
BRIXEN, E., B. Audio Metering - Measurements, Standards and Practice, 2nd edition. Focal Press, 2011. ISBN: 978-0-240-81467-4 (EN)
AES17-2015, AES standard method for digital audio engineering - Measurement of digital audio equipment. Audio Engineering Society, Inc., 2015. (EN)
IEC 60268-3:2013, Sound system equipment - Part 3: Amplifiers. International Electrotechnical Commission, 2013. (EN)
IEC 61672-1:2013, Electroacoustics - Sound level meters - Part 1: Specifications. International Electrotechnical Commission, 2013 (EN)
Planned learning activities and teaching methods
Teaching methods depend on the type of course unit as specified in article 7 of the BUT Rules for Studies and Examinations.
- Lectures provide explanations of the basic principles, subject methodology, examples of problems and their solutions.
- Laboratory exercises support practical mastering of the themes presented in lectures. Active participation of students is required.
Participation in lectures is recommended. Participation in other ways of instruction is checked.
Course is taking advantage of e-learning (Moodle) system.
Assesment methods and criteria linked to learning outcomes
Evaluation of study results follow the BUT Rules for Studies and Examinations and Dean's Regulation complementing the BUT Rules for Studies and Examinations. Up to 40 points can be obtained for elaboration of all laboratory exercises. The minimal scope of the elaboration of a particular laboratory exercise and the complementary questions are specified by a regulation issued by the guarantor of the course and updated for every academic year. Up to 60 points are given for the final examination, and it is necessary to get at least 20 points for its successful completion.
Language of instruction
1. Noise measurement, recommendation IEC 61672
2. Identification of noise sources
3. Measurement of sound intensity and acoustic power
4. Measurement uncertainties
5. Measurement of audio equipment parameters, AES recommendations 17
6. Methods of automated measurement, measurement stability
7. Measurements in closed and open loop
8. Spectrum analysis, Dual FFT and TDS methods, order analysis
9. Analysis of nonlinear distortion, multitone analysis
10. Measurement of parameters of electroacoustic devices, recommendation IEC 60268
11. Case study - noise measurement
12. Case study - measurement of audio equipment
13. Case study - electroacoustic measurement
The aim of the course is to introduce students to modern methods of automated measurements in acoustics, electroacoustics and audio technology.
Specification of controlled education, way of implementation and compensation for absences
It is obligatory to undergo all laboratory exercises in regular or alternative terms to complete the course. Other forms of checked instruction are specified by a regulation issued by the guarantor of the course and updated for every academic year.