When noise becomes or is anticipated to become an issue, the first proposed solution is generally high STC (sound transmission class) partitions and high CAC (ceiling attenuation class) ceiling systems. However, neither approach is enough because sound easily passes through gaps and holes called sound flanking paths. If these paths aren’t closed, increasing STC or CAC will do nothing to lessen the noise.
Consider a leaky pail: a pail with holes in it will leak water, no matter how thick the pail itself is. In considering sound control, recessed electrical outlets are essentially holes in the wall that will leak sound, and a thicker partition won’t solve the problem. Rather, the holes need to be sealed.