M.-L. HSUEH, J.-P. CHEN, B.-Y. LU, H.-D. WU, and P.-Y. LIU, “Comparison of Moving Average and Differential Operation for Wheeze Detection in Spectrograms”, Arch. Acoust., vol. 47, no. 3, pp. 383–388, Aug. 2022, doi: 10.24425/aoa.2022.142012.