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The key to stored grain temperature measurement by acoustic method is to measure sound travel-time exactly. Grain is a highly absorbing acoustic medium, as a result, the sound signal received by the microphne far from the sound source has very low signal-to-noise ratio. In order to improve the sound travel-time estimation accuracy, a wavelet denoising-based(More)
Sound velocity is dependent on medium temperature and can be estimated from the sound travel-time in medium. Stored grain is a highly absorbing acoustic medium, therefore the acoustic signal distorts seriously after a long distance transmission, which increase the difficulty in the estimation of sound travel-time in stored grain. In order to improve the(More)
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