think I know what you're hearing
Although we've had our differences Jaymatt, I'm willing to put all issues aside and help answer your question because I believe I know what you're hearing. I have confirmed 158.880 as the INPUT frequency for the IRT Subway Operators in NYC. Those trains run into the Bronx, so you can most likely hear them on input from Bergen County. If they sound like train operators, that's definitely what you're hearing!