Table 2.

Classification of sounds in all recorded sound files (N=1201).

Sound classification		Value
Characteristics of wheeze sounds, mean (SD), range
	Frequency (Hz)	321 (178), 100-1600
	Intensity (dB)	21.2 (7.0), 5.0-45.0
	Duration (ms)	331 (220), 100-2538
Type of wheeze sounds, n (%)
	Monophonic wheeze	457 (38.1)
	Polyphonic wheeze	744 (61.9)
	Total	1201
Noise, n (%)
	Nasal congestion	108 (19.4)
	Physician’s voice	155 (27.8)
	Ambient crying or voice	294 (52.8)
	Total	557