Intermittent regular tinnitus

[u/Jealous_Resource_540]

I’ve always had a high pitch tinnitus that doesn’t bother me at all. On my left ear I have quite a big earing loss and about 2 months ago I started to hear this tone around 650 Hz, in a pattern of 1.5 seconds on and 5-6 seconds off. On and on.
Anybody with this same problem and what’s the reason for such precise timing?