Návrh hlasité hovorové soupravy s potlačením akustické zpětné vazby

Abstract

The purpose of the bachelor's work is to design a loud speech kit designated for domestic communication systems, in which it is necessary to provide acoustic feedback suppression. All drafts are implemented by using components, whose main characteristic is the low power consumption. The work is divided into a theoretical and a practical part. The theoretical section summarizes basic terms such as electroacoustics, feedback, microphone, speaker and a brief theory of domestic communication systems and hybrids conversion. The practical section is divided into sub-sections. Each section represents an individual segment of domestic telephone connection including descriptions, diagrams and calculations. The last item was to verify the functionality or if it's needed, tuning of individual circuits. The testing is done on an unsoldered field, where we use a sinusoidal signal generator and an oscilloscope to view the behavior of the input and the output voltage.