ESP32-Wroom coil whine (high beeping noise)

[xeroe343]

Hello,
Im using the esp32-wroom module on a custom pcb and i recognized a high pitched sound coming from the module.
The chip seems to be working normally, but the sound is quite uncomfortable and also worrying.
Has anybody ever experienced this or an idea what might be causing it?

My first thought was maybe a bad voltage regulator, but directly connecting it to 3v3 doesnt fix the problem either.

[ESP_Sprite]

That sounds odd... normally coil whine is because there's a switching power converter that works in the audible range, and either coils or sometimes capacitors vibrating at that frequency. Thing is, the Wroom module does not have any switched power supplies inside, so I wouldn't know where that sound would come from.

[Jens Deuhr]

Yes I also experience high pitch whining sound from ESP32 wroom board . What might be possible reason of it .