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

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Vyshedskiy, Andrey; Murphy, Raymond;

Objective. It is generally accepted that crackles are due to sudden opening of airways and that larger airways produce crackles of lower pitch than smaller airways do. As larger airways are likely to open earlier in inspiration than smaller airways and the reverse is li... View more
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