Question about complex/specific selection

We typically edit two mono tracks that are synced. Unfortunately we also end up with several dead spaces/pauses in our recordings, and therefore spend what is hopefully an excess amount of time removing these dead spaces/pauses. I am curious if there is a way for me to select all instances in every track open in a window of sound being below a certain threshold.

ie:

-----:||:—:|:-----------:||:—
-----------------:|||:---------

using this (hopefully not theoretical) selection tool would result in

:neutral_face:|:—:neutral_face::-----------:neutral_face:|:—
---------------:neutral_face:||:---------

the blue areas being selected.

Alternatively, if selecting all tracks is not an option, I can certainly merge both tracks after other editing and then delete the pauses. Hopefully this type of selection is an option! Thank you.

See the “Truncate Silence” effect: http://manual.audacityteam.org/man/truncate_silence.html