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http://dx.doi.org/10.6109/jkiice.2016.20.2.268

Comparison of the Effect of the Interpolation Function on the Performance of the Noise Source Imaging Technology  

Park, Kyu-Chil (Department of Information and Communications Engineering, Pukyong National University)
Yoon, Jong Rak (Department of Information and Communications Engineering, Pukyong National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.20, no.2, 2016 , pp. 268-274 More about this Journal
Abstract
To find the location of a random noise source present in the three-dimensional space is required at least four microphones. Using four microphones distributed in a three-dimensional space, noise source imaging technique was applied and evaluated on their performance. To compensate resolution problem which comes from both the position of the sensor array is fixed and the sampling frequency is low, up-sampling technique and interpolation function were applied. Five different interpolation methods were applied such as zero-padding, zero-order hold, first-order hold, spline function, and random signal padding. The up-sampling rate were chosen by two, four, eight times, and counting up 16 times. As a result, it was possible to more accurately estimate the position of the noise source according to the higher of the up-sampling rate. It also found that the first-order hold and the spline function's performance were slightly falling relative to other methods.
Keywords
Cross-correlation function; Interpolation function; Up sampling; Resolution; Noise source imaging;
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Times Cited By KSCI : 1  (Citation Analysis)
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