Crackle Pitch Rises Progressively during Inspiration in Pneumonia, CHF, and IPF Patients

Table 3

An average change in crackle pitch among the patients whose crackle pitch increased during inspiration.

	Pneumonia	CHF	Interstitial fibrosis	Total
From early to mid-inspiration (Hz)	46 ± 47	43 ± 55	40 ± 46	42 ± 49
From mid to late-inspiration (Hz)	49 ± 45	57 ± 45	38 ± 41	48 ± 44