Acoustical caulking.
Yes. You need to seal all potential air leaks with non hardening acoustical caulking to achieve the best Field Sound Transmission Class (FSTC) and Field Impact Isolation Class (FIIC) ratings. Use fire rated sealant where required. Enclose all recessed light fixtures with proper noise control design enclosures (fire rated when required). Seal all electrical boxes with putty pads. Evaluate the installation sequence to maximize noise control. Evaluate air ducts & air returns to ensure best FIIC (field impact isolation class) and FSTC (field sound transmission class) results.
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