The signal such as audio or musical sound changes locally and it is considered as the unsteady signal with its frequency varied along the time. To analyze these signals, Short-time Fourier Transform and Wavelet Transform are usually used and we selected The Discrete Haar-Wavelet Transform. On the image recognition, the template matching is widely researched by multiplex resolution of wavelet transform and it revealed so effective. In the present study, we apply this to the audio and make examinations using simplest template matching.
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