This arm will serve as the control group for this randomized trial. Patients in this arm will receive normal standard of care anesthesia during their total knee arthroplasty.

This arm will provide patients with an active noise cancelling headset system that they may use to select music or a movie for audiovisual distraction during the surgery.

The ANC Headset will allow patients to select music or a movie for audiovisual distraction during their surgery. This can be used when patients are not receiving general anesthesia (full sedation) for their surgery.

Richmond Agitation-Sedation Scale (RASS) measures the amount of sedation necessary for a patient at different levels of discomfort or agitation during local anesthesia surgeries.

This will measure the volume of patients that were unable to complete their procedure using spinal anesthesia and due to discomfort or agitation required deep sedation to continue to surgery.

Mean rate of propofol infusion necessary to achieve sedation targets during the procedure. Unit: mcg/kg/min

Patients will complete a satisfaction questionnaire post-operatively to determine their level of comfort with the sedation protocol they received during surgery.