The posted article measured 67db, the sound of a lively conversation, next to the data center. I am interested to learn where the 96db comes from. I see only

The posted article measured 67db, the sound of a lively conversation, next to the data center. I am interested to learn where the 96db comes from. I see only vague claims about up to 96db inside of a server rack, but could not locate a concrete measurement or method used to determine this number.