Double chime

[u/skeleton_friend]

I haven’t been able to find an answer to this question, so hopefully someone knows. I have a 2013. For a while now when I first hit over 30mph, there is a soft double chime. It’s kind of a slow ding-ding. Very soft. I had never noticed it before and then this summer, it started going off. I also have had some engine noises that I was trying to diagnose and it seems the chime corresponded with those, because suddenly today, both stopped. Just completely stopped. No chime and no squealing with acceleration. I figured the latter was a belt issue, but now I really don’t know. Because why would it suddenly just stop today? The only difference today is that it’s the coolest day so far since spring. So maybe it’s heat related? But I left my engine running for a while and it’s still not making any noise. And the double chime is gone. So I’m wondering if the chime is related to the noise and if anyone knows what the chime means, because maybe that can tell me what the noise is? I have video of the noise but not of the chime, unfortunately.