My job can be completely silent for hours on end. I work from home and I talk to someone about once a month for an hour. Almost everything is done online. I have a keyboard that clicks so I hear the typing if I use the keyboard, it I just use my laptop no clicking. I often have the TV on in the background, but not always. Especially when I work on my patio it’s very very quiet.
I worked in records in a hospital now and then and it was very quiet. I was mostly filing the records not interacting with other staff, never dealt with patients in that job. Sometimes I had to copy a chart, so the copier made some noise. Now that charts are electronic more and more maybe that job is changing. Thing is, I was on my feet a lot, and somehow quiet while moving around is t the same as quiet and sitting more still. In fact, even working from home, if I’m weaving in other chores it makes it less peaceful, less quiet.
Tending to a plant nursery or farm. Clipping leaves, and maybe you hear the water when watering the plants. If it’s large there might be other workers, which would change the scenario.
Jobs where you test the environment can be quiet if you consider nature quiet. Samples of soil and waterways. Driving to the location (is that quiet?) taking samples, and writing up findings. Eventually, you do talk to some people though.
A job as a baker. Some machine noise now and then if it’s very large scale with large mixers, but a smaller scale operation, if you are a one man show, it should be relatively quiet, especially if the items have long cooking times.
Crafts done by hand. Painting, sculpting (depending on the material) glass fusion, weaving, rug hooking.
Taste tester and product tester. Eventually, you need to communicate somehow your findings, but depending on the job it might mostly or all be in writing. It’s often not a full time job though.