Question from left field.

I've been a commercial A&P for over a decade, and use to fly a lot prior to that. So much so that the sound of the engines put me to sleep pretty quickly. Alexa use to have a sleep sound that I was pretty sure was CFM56 turbofan. But they've changed the noise to something like a floor fan with two people talking quietly in the back ground.

My question is does anyone know of a sound machine/ white noise generator that has a realistic jet engine noise?