What are these files for?

[Aurora11]

For example;
update\x64\dlcpacks\mpexecutive\dlc.rpf\x64\audio

.dat files (.dat10, .dat151 etc..)
.nametable
.red

update\x64\dlcpacks\mpexecutive\dlc.rpf\x64\audio\occlusion.rpf

.ymt files.

So anyone knows what are these files containing? or at least does any of these contains an audio file?

I'm trying to find online phone sounds, deleted every single .awc files however they are surprisingly and very interestingly still there except the Ringtone 3.