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National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Noise control of computer-substitutuion of air ventilator with liquid cooling
 Daněk, Petr ; Ošmera, Pavel (referee) ; Pellant, Karel (advisor)
This bachelor thesis describes the possibilities of reducing computer noise by replacement of computer fan cooling with water cooling. Moreover the efficiency of the application of soundproof materials on inner computer is discussed. The sound-level meter Brüel & Kjaer 2231 is used for quantitative evaluation of proposed suggestions.
Detailed record
Positioning System for Sound Intensity Probe
 Sedlář, Pavel ; Kouřil, Jiří (referee) ; Schimmel, Jiří (advisor)
This bachelor thesis deals with a development of a 2-dimensional positioning equipment for an acoustic measurement using modules of linear positioning axises MAXS1BR and PAS41BR and stepping motors ILS1R573PB1A0 by Schneider Electric. These motors include integrated power stage and interface RS485. An interface converter using integrated curcuit MAX232 by MAXIM for interconnection between these motors and a control computer was designed. The circuit of the converter was built and tested in a solderless breadboard at rst. Afterwards, a printed circuit board was developed using software EAGLE Layout Editor. This thesis also includes a documentation of mechanic parts, which are necessary to grip measuring appliances.
Detailed record
Car speed measurement
 Vořechovský, Karel ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
Car speed measurement using the Doppler effect
Detailed record
Noise control of computer-substitutuion of air ventilator with liquid cooling
 Daněk, Petr ; Ošmera, Pavel (referee) ; Pellant, Karel (advisor)
This bachelor thesis describes the possibilities of reducing computer noise by replacement of computer fan cooling with water cooling. Moreover the efficiency of the application of soundproof materials on inner computer is discussed. The sound-level meter Brüel & Kjaer 2231 is used for quantitative evaluation of proposed suggestions.
Detailed record

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