Noticed this sound recently, recording attached. Around 15 seconds a high pitched constant noise occurs, seems to fade away at the end. It seems to be front right, but hard to distinguish. This morning I reversed before the 15 seconds and the sound seemed delayed compared to the 15 second start when in park. I did noticed the sound became audible with slight acceleration when driving around the neighborhood. It doesn’t seem to increase in frequency with acceleration, but it’s hard to tell. The recording isn't the best, but it sounds like a fan? Normal? Haven't heard/noticed prior, no other issues. 19R Coupe. Taking this Monday for yearly maintenance.