I'll be at work and all of a sudden notice a strange, high frequency sound and immediately I wonder to myself "oh my gosh.. Is this a new sound for my T or can other people hear it too?" Just a few days ago, I went to the movies and there was a really weird electrical hum outside the theather. Immediately my heart rate picked up and I asked my boyfriend if he could hear it too (luckily he could). Anyone else find themselves doing this? It's really creating a lot of anxiety and I can't stop doing it!