This mod brings back a similar soundproofing from 1.42 for ETS2 default trucks affected by the 1.43 interior cabin sound update.

Features:

• Stops in-cab sounds from being louder than when the camera is outside and next to the engine.
• Reduces the excess reverb in the cabin.
• Lowers sound volume of high pitch sounds such as turbo when windows are closed.

More info:

You can enable this mod with low priority in the Mod Manager if you want.

Modders are welcome to use the baseline settings provided in this mod for sound_effects_units.sui

Tip: Do not stray too far in increasing gain values, because it may affect all sounds such as traffic and ambient sounds.