Only I can hear the peculiar sound our air conditioning is making

I keep hearing this peculiar sound in the middle of the night, it is so high pitched that, at first, I wasn’t sure I was absolutely hearing it, then but it is easily there.

It sounds love a absolutely high pitched whistle.

I usually have the TV or our music on when I am home during the afternoon. I assume that explains why I only hear the sound at night when I am trying to fall asleep, and occasionally, it even wakes me up when I am already asleep. At first, I thought it was our refrigerator making the noise; However, after a bit, I realized that it is our air conditioning. I only hear the whistling sound when the compressor is on. I went outside but I can’t hear the sound when I get up close to the air conditioning compressor. I assume that the sound of the fans drowns it out or something, and maybe it can only be heard through the air duct. I don’t know. I just worry that if I call for some Heating & Air Conditioning service, the worker won’t even be able to hear the sound at all. After all, our wifey can’t hear it, then she says that the whistling sound is all in our head but I assume it is there. I don’t want to waste money having an Heating & Air Conditioning worker come out only to tell me that our Heating & Air Conditioning idea is good as well as he doesn’t hear any peculiar noises… What if the sound absolutely is all in our head? Or, maybe I just gained super human hearing somehow. Maybe this sound is normal for the air conditioning as well as I just couldn’t hear it before.

furnace/heater service