Měření hluku pomocí akustické kamery

Abstract

This thesis deals with the measurement of noise using a Brüel & Kjær acoustic camera type 9712-W-FEN and the processing of the obtained data in MATLAB. The theoretical part is devoted to the description of the principle of acoustic cameras, the measuring equipment used, a survey of other types of acoustic cameras and a detailed analysis of beamforming including the Delay-and-Sum method. The practical part includes the implementation of the algorithm, the output of which is acoustic maps localizing noise sources. In order to verify the functionality of the algorithm, a series of measurements were performed with different noise sources placed in different positions in the measurement space. The results were compared with the outputs from the BK Connect - Acoustic Camera application. The work also includes the design of educational materials for practical use of the acoustic camera and evaluation of the results obtained, including an analysis of the accuracy of noise source localization.