The train came in just 8 minutes. Arriving in Delft, I took a hotel room across the street from the train station. I was pleasantly surprised that the trains run all night long. I never heard a horn blast, whistle shrill, or bell clang. It's all electric, so there's no diesel noise, either.
Trains make no sound at grade crossings.
There is a bell, but it's quiet. But the red lights and crossing guards are enough warning for those far from the track. The Dutch bells are for people near the track. They don't have to be ear splitting. People can hear them if the there's a chance of stepping or biking onto the track.