Fig. 1.

Average dB recorded from sound level meters placed at three locations within breast surgery and craniofacial ORs. dB readings of common sounds at each location are also provided. Statistical comparisons were made using Student t tests at a significance level of P < 0.05. *Anesthesiology sound level meters recorded significantly quieter dB than those surrounding the surgeon and circulator (P = 0.013 and P = 0.045, respectively). **Craniofacial cases were overall significantly louder than breast cases due to significant increases in noise around the surgeon and circulator (P = 0.002 and P = 0.018, respectively). BP, blood pressure.