How to reduce audible_noise0 pages

HOW TO REDUCE AUDIBLE NOISE
Audible Frequency Range
It is said 20Hz to 20KHZ.

Power Supply Switching Frequency
VS Noise Generation
Efficiency is Key for high performance Power Supply. To achieve it,
Switching method is being selected as for appropriate solution. The
switching frequency is mostly like 30 to 150KHz,
To improve efficiency more at low load it is used to apply
load,
“burst mode “ solution.
The Burst mode frequency is within the audible frequency band, Power
Supply would generate audible noise at low load condition like Stand by
mode, and it is needed to minimize. Mostly the roots of the audible noise
was created by Switching Transformer.
And depends on that structure, the level of noise would be changed.

Burst Mode

Any solution there??

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