Manabu Kotani Yasuo Ueda Haruya Matsumoto Toshihide Kanagawa Acoustic diagnosis for blower with wavelet transform and neural networks. 718-723 1995 ICNN https://doi.org/10.1109/ICNN.1995.487505 conf/icnn/1995 db/conf/icnn/icnn1995.html#KotaniUMK95