Table 1.

Sound level measurements

Sound source	Average sound level (dB) ± S.E.M.	Sound range (dB)	P value
HoLEP	67.37 ± 0.13	65.00–70.00
TURP	46.41 ± 0.29	42.10–51.82	<0.01
Anesthesia alarm	64.71 ± 0.73	63.07–69.31	0.73
Base Line	45.38 ± 0.35	44.21–49.76	<0.01