That was a typo. I think it's called tetinitis. It's when you (usually older people) hear a hissing sound that's not real. It's not a real noise, It happens sometimes when the older person is losing his hearing it's like a replacement sound. It can come and go at random.

The maintenance and property management is horrible. They won't fix anything. I don't hear it now. I think something was wrong with the heat and now that the heat's off for the season the noise is gone.