Does anyone know how to reduce ultrasound levels in DC/DC converters?

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Raviraj Vader

The controller might not be stable for the chosen inductor and capacitor, which is leading to oscillations, and the highly switching current in the inductor might be leading to such kind of behaviour.

Javier Luis López

I have not the numbers yet.

I tested a lot of different materials and the best damping ones were neoprene, rubber (the same that used to erase pencil writing) and the human finger!

Thanks to Ravira and Holger, your responses are appreciated.