There is no method to 100% eliminate the noise. Instead, it can be suppressed or weakened. The source of noise is usually caused by a mechanical resonance in the component that is excited by the electrical conditions of the circuit, known as magnetostriction, and does not indicate a defect in the part. It depends on the application conditions and is not always possible to eliminate by changes to the inductor.

Changing the switching frequency is the best way to eliminate the noise. Applying a dampening material (electronic-grade encapsulant, potting compound, etc.) may decrease the produced sound level while the increased mass of a larger component may dampen or shift the resonance to a different frequency.