Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Diaphragm force-frequency relationship. Data shown are specific forces (in N/cm2), with force normalized for estimated cross-sectional area (CSA). Lines represent best fit using sigmoidal Hill equation. Sham and CHF are shown as in Fig. 1. Significant differences are indicated in Fig. 6 for clarity.
