The acoustical noise levels in the first floor transmitter rooms was 89dba. The primary source of this noise was the large amount of water flowing through all the components at high pressure and high volume. Water just to cool the klystron collector flowed at a rate of 400 gpm.
Operators anywhere on the first floor were subjected to this noise level continuously. Ear protection was available in the form of Swedish wool, but few wanted to use it because it inhibited one's ability to hear problems that gave off an audible sound, and the transmitter certainly had more than its share of noise related problems.
The highest noise was on the balcony 2nd floor where the acoustical noise level was 109dba from the ferrite switches and the kludge.