I encountered a similar problem with you, I use the 12V switching power supply with dimming decoder, into the dimming console DMX512 control, in the dimming when the switching power supply is creak sound, ask you there A better solution? thank
the human ear should not reach this sensitive range.
, I personally think that electromagnetic excitation of this, in addition to resonance, the other amplitude is very small
Noise source will be there, the frequency of the ear is sensitive to the range of 20Hz ~ 20KHz,
