Skip to content

Cornell Lab of Ornithology

CLO logo (bottom)
Sections
Personal tools

Double Knocks from the Big Woods of Arkansas

Knock, knock, who’s there? December 25, 2004

This recording is an example of a double knock recorded in the Cache River National Wildlife Refuge, Arkansas. The double knock is followed by the sound of a gunshot. On the sonogram, the gunshot can be distinguished by its sail-shaped, tapering smudge.

Choose "Interactive Analyzer" to explore the sonogram and see it scroll across the page as the sound plays. When viewing the sonogram, click on the circled i for information about how to use the sonogram features.

Choose "Simple Sounds" for a faster download of a fixed sonogram and an audio file.

Interactive Analyzer
Instructions for downloading the Analyzer