C11 said something that was not intelligible to the moderators about cables to B11.B11 responded "I can't hear you" and then C11 repeated his question louder.B11 attributed the difficulty to the amount of noise generated by the system and reported that C11 was “mumbling” and the system was booting up.System ambient noise – The system noise in addition to the ambient noise of the other OR equipment can mask users’ voices, especially when they are farther apart (T11).