TABLE 4.

Ranges and chosen values for hyperparameters and augmentation parameters

Parameter	Type	Range	Value
Batch size	Hyperparameter	[16, 32, 64, 128]	64
Dropout	Hyperparameter	[0.2, 0.5]	0.5
Epochs	Hyperparameter	20	20
L2 amount	Hyperparameter	[1e−6, 1e−2]	1e−6
Learning rate	Hyperparameter	[1e−9, 1e−2]	0.0075
Network size scale	Hyperparameter	[1, 2, 3, 4]	2
Gaussian noise intensity	Augmentation	[0, 20]	0.8
Gaussian blur	Augmentation	[0, 3]	0
Horizontal shift	Augmentation	[0, 50 px]	[0, 20 px]
Random dB offset	Augmentation	[0, −40 dB]	[0, −40 dB]
Vertical shift	Augmentation	[0, 5 px]	[0, 2 px]

Single value ranges indicate that the parameter was held constant. Zero‐values for continuous parameters indicate that the parameter was not used. Values that are ranges indicate that values were randomly chosen from this range on a per‐spectrogram basis (augmentation only).