Only I can hear the noise of my air conditioning

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

  • It sounds love a absolutely high pitched whistle.

I usually have the TV or my music on when I am home while we were in the afternoon. I guess that explains why I only hear the sound at night when I am trying to fall asleep, sometimes, it even wakes myself and others up when I am already asleep, at first, I thought it was my refrigerator making the noise, but however, after a bit, I realized that it is my air conditioner. I only hear the whistling sound when the compressor is on. I went outside despite the fact that I can’t hear the sound when I get up close to the air conditioner compressor. I think that the sound of the fans drowns it out or something… Maybe it can only be heard through the ductwork. I don’t know. I just worry that if I call for some Heating, Ventilation in addition to A/C service, the serviceman won’t even be able to hear the sound at all. After all, my wife can’t hear it. She says that the whistling sound is all in my head despite the fact that I think it is there. I don’t want to waste money having an Heating, Ventilation in addition to A/C serviceman come out only to tell myself and others that my Heating, Ventilation in addition to A/C system is good plus he doesn’t hear any different noises… What if the sound absolutely is all in my head? Or, maybe I just acquired super human hearing somehow. Maybe this sound is normal for the air conditioner plus I just couldn’t hear it before.

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