Good but weird background music/tones – Bedtime Fan: White Noise Baby Review

My daughter is in the hospital on life support and sometimes I do not want to leave her bedside to sleep at night, so I downloaded this app to help drown out the noise of the ICU. It worked well the first time. But the next night, I noticed weird background music/tones and now I hear them constantly, less with the "high" setting. I'm not sure why they're there, but I find them unsettling and they jar me awake.
Review by Schuetz10 on Bedtime Fan: White Noise Baby.