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Subjective evaluation of background noise in audio systems
Falešník, Vlastimil ; Mach, Václav (referee) ; Rášo, Ondřej (advisor)
In this bachelor thesis, the effect of additive background noise on audio recordings was researched. This kind of noise often occurs when these recordings are being restored. The most frequent effort is to suppress these unwanted noises. While suppressing the noises, the most problematic part is that it always depends on subjective evaluation of the listener. Practical impacts of these noises were researched throughout two listening tests. Afterwards, it was necessary to choose proper (ordinal) evaluating scale. The listening tests established the subjective assessment of jammed additive noise degree. Finally, the effect of selected parameters on subjective perceived quality was determined.
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Methods of Multiple-Criteria Decision Making
BRABCOVÁ, Michaela
This thesis explores methods of multiple-criteria decision making and their application on data gathered from yearbooks published by Czech Statistical Office and from my own survey based on a questionnaire. The main aim is to describe different methods of multiple-criteria decision analysis, demonstrate their applications, and illustrate the benefits and drawbacks on a specific case. The task is to compare quality of life in all districts of South Bohemia and compile their ranking. The alternatives examined are the counties of České Budějovice, Český Krumlov, Jindřichův Hradec, Písek, Prachatice, Strakonice, and Tábor. The selected decision criteria used in this evaluation consist of the price of apartments, rate of unemployment, quality of health care, average wage, criminality and rate of environmental pollution. The theoretical part of this bachelor thesis depicts diverse methods of decision-making and their basic advantages and disadvantages. Examples of these techniques are methods based on aspiration levels, such as PRIAM, methods based on ordinal scales, ORESTE, and finally methods based on cardinal scale, such as Weighted Sum Approach, Analytic Hierarchy Process, TOPSIS, AGREPREF, ELECTRE, PROMETHEE and MAPPAC. The practical part describes the actual application of the methods on the selected case and final results of this work. The outcome includes rates of importance for each criterion and county rankings from best to worst based on the methods mentioned above.
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Subjective evaluation of background noise in audio systems
Falešník, Vlastimil ; Mach, Václav (referee) ; Rášo, Ondřej (advisor)
In this bachelor thesis, the effect of additive background noise on audio recordings was researched. This kind of noise often occurs when these recordings are being restored. The most frequent effort is to suppress these unwanted noises. While suppressing the noises, the most problematic part is that it always depends on subjective evaluation of the listener. Practical impacts of these noises were researched throughout two listening tests. Afterwards, it was necessary to choose proper (ordinal) evaluating scale. The listening tests established the subjective assessment of jammed additive noise degree. Finally, the effect of selected parameters on subjective perceived quality was determined.
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