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This thesis is focused on the use of the Audio Precision audio analyzer, model APx515. The goal of this thesis is to educate the operator of the measuring instrument about its functions and features. Supporting chapters cover deeper understanding in the field of audio. This thesis was written on the request of the Department of Physics and Biophysics, the University of South Bohemia and shall be used as a methodological guide for working with this audio analyzer. The first part of this document will discuss the theory of audio analysis, and in the second section I will cover the practical usage of the instrument. In the theoretical part, there are various kinds of measurements and audio tests described. Special attention is devoted to commonly used units in audio engineering including their explanation. The next chapter, Acoustic, describes basic terms about sound from a physical and psychoacoustic point of view and also focuses on human hearing. The Chapter about Hi-Fi then describes issues relating to quality music reproduction. The practical part focuses on the use of the analyzer. Several kinds of connections for different tests are described. They are followed by measurement results of a sample of devices of different kinds: preamplifiers, power amplifiers, integrated amplifiers and DACs in consumer electronics.

Článek analyzuje působení a roli Bosňáků v současném džihádistickém hnutí. Dané aktivity jsou posuzovány ve třech dimenzích – domácí působení (místní radikální skupiny, rekrutování, motivace či role diaspory), aktivity na zahraničních bojištích (bojové aktivity, propaganda či podpůrné aktivity) a návrat do vlasti (násilné aktivity, deradikalizace či aktivity státních autorit). Analýza se zaměřuje na bojovníky z Bosny a Hercegoviny, Srbska, Černé Hory a států s významnou bosňáckou diasporou. The article analyzes activities and role of Bosniaks in contemporary Jihadist movement. Those activities are analyzed in three dimensions – domestic activities (local radical groups, recruitment, motivation or role of diaspora), activities on foreign battlefields (combat activities, propaganda or support activities) and return to homeland (violent activities, deradicalization or activities of state authorities). Analysis is focused on fighters from Bosnia and Herzegovina, Serbia, Montenegro and countries with significant Bosniak diaspora.