Does anyone 'hear' white noise when meditating?

I just started using the Muse device and notice that my calm periods correlate to an internal ‘white noise’, and recoveries also are related to losing focus on the white noise then refocusing for recovery.

This level of white noise isn’t tinnitus, or if it is it is a very mild case, because I have to purposely focus on it to ‘find’ it and make it grow louder. If I do a session where I put in a strong effort to remain focused on the white noise I can get into the 90% clam area.

Just wondering if anyone has this experience or has read about it?