My experience has weirdly been the opposite. I got a job at a crowded and noisy casino. During some big events it was so crowded I had to walk sideways through

My experience has weirdly been the opposite. I got a job at a crowded and noisy casino. During some big events it was so crowded I had to walk sideways through crowds in the slot machine area. And very loud due to slot machines and people talking, yelling, screaming if they win. Eventually I realized as I conversed with my co-workers we didn't need to yell and I could hear them 10 feet away. Note we did also use CB radios too but no mic just open speakers blasting which added to the noise. I found out it is called the Cocktail Party Effect. It seems to be a learned skill that comes with time but it isn't something you naturally have. Ironically I probably now have hearing damage too working in that loud environment.