A bit more than that. And old freight trains are loud, even when empty.
Another example, there is a small local passenger train with a combustion engine. Very loud, whether slow or fast. Unlike the mentioned modern electric one from Alstom, who are so silent, that they are dangerous when they pass by a train station and you are too close to the track. You only notice them moments before they wooosh by.
And if you want more than my anecdota of everyday experience, there are tons of youtube videos of different trains to see that trains can be loud, if that was not a manufacturing concern, or silent. Usually, the older the louder.
I think you missed my point, my fault. Passenger trains and individual train cars do indeed weigh considerably less than fully loaded freight. So yes....its not nothing but they are easily double the weight. Leading to my point that when you are 2.5x+ the weight, its a different engineering problem along with an issue of economics.
Freight cars are not loud only because of age but also because of weight and the challenges on both engineering and cost to remedy it. It is hard to compare a passenger train with a freight train, entirely different beasts.
Hm, for me they are quite simimlar. Just one was build to be more silent mainly for passenger comfort (it is inded nicer in the modern silent ones) and the other for most weight. But you could optimize freight trains for silence as well. All the loud metal scratching noises for example are avoidable, even with more weight. The ones I am talking about were just not build with noise in mind.