Resumo

RODRIGUEZ HERNANDEZ, Seriosha. Using LabVIEW for Measuring the Directivity Pattern of a Microphone Array. EAC [online]. 2013, vol.34, n.2, pp.86-100. ISSN 1815-5928.

This work is concerned with the implementation of a measurement instrumentation set that combines traditional and virtual instruments for measuring the directivity pattern of a microphone array. The instrumentation set also involves an anechoic chamber that allows the simulation of free field propagation conditions. The system automatically performs the measurement process and logs the results. The results are saved in both, spreadsheet and image format files, giving flexibility for post-processing and publishing. The operator can see, by mean of graphical indicators on a computer screen, the real time behavior of the measurement process. The system allows obtaining directivity patterns with one degree of precision. Also the reader will be able to appreciate the directivity patterns obtained from a group of measurements carried out with the proposed instrumentation set and the comparison of actual and expected theoretical results. All the results were obtained using a linear uniform array with eight microphones as device under test.

Palavras-chave : LabVIEW; virtual instrument; microphone array; directivity pattern; acoustic measurements.

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