The fan of my UX431FA makes much noise after some time

[ZT-7d7ae16f]

System: windows
Battery or AC: both
Model: UX431FA-AM132T
Frequency of occurrence: after some time
Reset OS:
Screenshot or video:
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Detailed description：

[Blake_ASUS]

Hello wheuves,
May you describe more?
What program or function were you using ?
and how long have you been using the device and the fan started to speed up?
Thank you.

[ZT-7d7ae16f]

I was listening to music streaming (Idagio) via bluetooth. The noise started after 30 minutes. I noticed that the speeding up is not always the case. Thank you for your answer.
Wheuves

[Blake_ASUS]

Hello wheuves,
What do you mean by "the speeding up is not always the case"?
Any abnormal sound from the fan?
Thank you.

[ZT-7d7ae16f]

The speeding up is occasional and according to me not related to a specific program . It is just a noisy sound, not abnormal.