Acoustic privacy analysis

Hi there,

I have a question about pachyderm, for the component “Sound transmission index(STI)” there is a required input N, seemed like it should be input the floating but when I connect it to a number slider, it never works. When there is error happening, the component says:

so what exact information I should connect to the input ?

Further more, I have been trying to use Equis sons as another option, but the result turns out nothing.

I wonder why is that happen.