Good idea; when my neighbor told me one of my cats escaped when I was out of town I told her to turn the TV on and leave the window open. BTW it didn’t work; but 1 day after I came home she showed up, I think because she saw my car.
Had several cats over the years that learned to associate the sound of my car with my presence.
So when they heard my car pull in, they knew I was on my way.
Of course they had to show feline disdain and disinterest when I came in, but they were sitting by the door watching me enter.