Results
With no amplification, the mean volume and clarity scores for both surgeons were 4.3/10 (volume) and 3.4/10 (clarity). For the surgeon with the Bluetooth speaker, the mean volume score was 8.5/10 and clarity 0.9/10. For the surgeon with the guitar amp system the mean volume score was 7.7/10 and clarity 7.0/10. (Fig1).