Table 1. NICU sound sequences used for testing.

	Primary Noise			Background Noise		Combined
Sequence #	Noise Source	% time active	Tones, (decreasing order of amplitude) (Hz)	Noise Sources	% time active	Leq 1 min (dBA)
1	Patient monitor alarm (high priority)	50	960	Bubble CPAP, Hospital air handling system	100	69
			2,880
2	Patient monitor alarm (medium priority)	100	1,440	Bubble CPAP, Hospital air handling system	100	72
			480
			960
			1,920
3	Syringe pump end volume alarm (low priority)	8.3	2,761	Bubble CPAP, Hospital air handling system	100	57
4	Syringe pump occlusion alarm (high priority)	8.3	2,745	Bubble CPAP, Hospital air handling system	100	61
5	Patient monitor high alarm & Syringe pump occlusion alarm (high priority)	50 & 8.3	960	Bubble CPAP, Hospital air handling system	100	67
			2,880
6	Ventilator high pressure alarm (high priority)	8.3	384	Ventilator mechanical noise, Hospital air handling system	100	56
			1,173
			783
7	Ventilator respiration rate alarm (medium priority)	8.3	384	Ventilator mechanical noise, Hospital air handling system	100	52
			1,173
			783
8	Infusion pump occlusion alarm (high priority)	8.3	2,200	Bubble CPAP, Hospital air handling system	100	57
			550
			1,100
			1,650
9	Infusion pump end volume alarm (low priority)	8.3	2,002	Bubble CPAP, Hospital air handling system	100	55
			3,003
			1,001
10	Male and female voices	33	No prominent tones	Bubble CPAP, Hospital air handling system	100	49