In the house I lived it was not debunked. It was fact. The caltrain blasted it's horn hourly (or more) 24/7 within earshot of my house. I could not sleep with my window open and often slept with ear plugs even with the window closed. I get you might be tempted to spout generic statistics, but I can tell you without a doubt it was ear blistering loud up close, and sleep disturbing even 2 blocks away.

Also for what it's worth you have no idea if it's good or bad faith.