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

Table 4

An average change in crackle pitch among the patients whose crackle pitch decreased during expiration.

	Pneumonia	CHF	Interstitial fibrosis	Total
From early to mid-expiration (Hz)	74 ± 40	N/A	17 ± 17	53 ± 43
From mid to late-expiration (Hz)	37±48	N/A	49 ± 15	43 ± 36