2 Hour Fix: The springs inside the switches could be pinging, open up the switches and lube the springs to fix the pinging noise.
30 Minute Fix: The noise could be from a structure issue with the case, try opening the case and inserting foam under the PCB.
1 Minute Fix: Try typing with the keyboard flat and on a desk mat to dampen ping noises.
Luckily, we have a few different ways to get rid of that frustrating ping noise. Using a keyboard that makes a loud ping noise is a surefire way to ruin your typing and gaming experience.