An official website of the United States government
Here's how you know
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.
Pressure-frequency relation in randomly selected 22-kHz and 50-kHz calls from 6 male rats. Measurements were taken at call onset and in the middle of 22-kHz calls and in the middle of 50-kHz calls.