Meanings of enveloping silence in English

Out of the enveloping silence Pierre's voice came softly:

Even the hobbled animals are at rest, and we enter into the enveloping silence for five or six dreamless hours.

Some creature splashed into the water straight before them with a noise that awakened the forest echoes and deepened the enveloping silence afterwards.

There's a moment or two of that deep, enveloping silence, not even Blake's voice audible, then it's broken by a chant from the common-room congregation.

At least she could now mix with her betters without reproach, free (in the all- enveloping silence) from the fear of betraying her humble origin.

All struggling with explanations seemed hushed into the silence of complete comprehension-anall-pervading ,envelopingsilence.