Deep Learning, Artificial Intelligence, Heart Sounds, Sound Classification, Cardiovascular Disease.
signal; and (2) the energy ratio of one state to another. 42 frequency bands from 10 Hz to 430 Hz ([10 20] Hz, [20 30] Hz, [30 40] Hz, …, and [420 430] Hz). So, there were 42 features for each of these bands. First, the Butterworth filter is applied to the raw signals. Then, the energy ratio of