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.
Sine waves with amplitudes of 40 μM (black triangle, ▼), 30 μM (red triangle, 
), 20 μM (blue circle, 
), and 10 μM (green square, 
) were applied with periods of 0.009 Hz, 0.018 Hz, 0.030 Hz, 0.045 Hz, 0.060 Hz and the attenuation of the output waveforms were determined as described in the text. The dashed line was found from Equation 1 using fC = 0.061 Hz.
