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Survey TI Implement Light Load High Efficiency Device(replace MPS)

Hi Sir,


Recently I've Boost IC audio noise from my customer feedback issue(use MPS).

Application IOT, source is battery, so need low iq, light load efficiency.

But meet light load high efficiency, usually standby mode uA load, occur audio noise...
 
Light load high efficiency TI and MPS are use PFM implement, so I just provide EVM to customer test ?
if have no audio noise, can replace
if have audio noise, customer still survey other competitor..
Can let know how to fix this issue, and advise me good solution ?