AUC	area under the curve
BiLSTM	bidirectional long short-term memory
CNN	convolutional neural network
DL	deep learning
DNN	deep neural network
EMD	empirical mode decomposition
FFT	fast fourier transform
GRU	gated recurrent unit
HC	healthy control
LSTM	long short-term memory
MFCC	Mel-frequency cepstral coefficients
ML	machine learning
PD	Parkinson’s disease
RPDE	recurrence period density entropy
SVM	support vector machine