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Optimalization of the measurement system for determination of the diffusion and reflection coefficients

Citace:
ZUZJAK, L., KAREL, J., TUREČEK, O. Optimalization of the measurement system for determination of the diffusion and reflection coefficients. In 10th European Congress and Exposition on Noise Control Engineering (EuroNoise 2015) - Proceedings. Maastricht: The European Acoustics Association, 2015. s. 1445-1448. ISBN: neuvedeno , ISSN: 2226-5147
Druh: STAŤ VE SBORNÍKU
Jazyk publikace: eng
Anglický název: Optimalization of the measurement system for determination of the diffusion and reflection coefficients
Rok vydání: 2015
Místo konání: Maastricht
Název zdroje: The European Acoustics Association
Autoři: Ing. Ladislav Zuzjak , Ing. Jan Karel , Ing. Oldřich Tureček Ph.D. ,
Abstrakt EN: This paper focuses on a new design of the measurement system for the characterization of reflective materials. The main aim of this work was effectively and reproducibly measure the diffusion and reflection coefficient. Presented measurement system allows to provide the multichannel synchronization record from 47 microphones in real-time. The measurement system consists of the microphone frame, connection cables and electronic devices (for amplifying, converting, processing of the signals etc.). The microphones are distributed uniformly in the frame with the shape of the semicircle with the radius of 5m. The fixed microphone frame ensures the producibility of each measurement. The frame is multifunctional: (1) mechanical protection, (2) electrical connection and (3) it ensures the first stage of amplifier and it also provides the power supply for the microphones. The frame can be also decomposed into smaller parts for easy transport. Becasuse of the very low value of the noise background it is possible to use this system in spaces commonly used for the characterization of the diffusers. The measurement in the real hall demonstrated the applicability of this system in the common practice.
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