A quieter bulldozer, instead of total silence or KABLAM!, a mere thud (or thump, if you will).
I was unhappy with the explosive (too loud!) default bulldoze sound. And making it completely quiet also felt unsatisfactory. So I created a few simple sound effects using public domain sounds.
There are 2 versions for each type of bulldoze sound (medium and large). They are both quite subdued.
Feel free to create new versions with other sound effects using this mod as a template, if you will.