Table 1 Experimental conditions

SED model

Network architecture

3 CNN + 1 BiGRU + 2 FC

# channels of CNN layers

64, 64, 64

Filter size (\(T\times F\))

3\(\times\)3

Pooling size (\(T\times F\))

8\(\times\)1, 2\(\times\)1, 2\(\times\)1 (max pooling)

# of units in BiGRU layer

64

# of units in FC layers

32

# of units in output layer

10

MLPs for each \(\varvec{\mu }\) and \(\varvec{\sigma }\)

Network architecture

3 FC

# of units in FC layers

64, 256, 128

# of units in output layer

64

Optimizer

Adam [29]

Activation functions

leaky ReLU