A Bit Too Loud ...

 ... for regular cluster munitions. 

Unless the sound from them coincided with another much larger explosion. Doesn't matter, really. Kiev has no air defense anymore. Neither does NATO which has been thoroughly demilitarized 

MO Of NATO...

Cannot win on the battlefield? Kill civilians. Czech MLRS Vampire with cluster munitions attacked apartment blocks in Belgorod--a classic MO of NATO advisers, with the US providing targeting through AD "gaps". In Russian. Thanks to DDG guys. Here is one of the cluster munitions hits people (nobody, luckily, was killed). This should be used at the Sandhurst and  USMA at West Point as an example of a "real" war.