Learning to Beatbox? Here is the Human Beatbox Sound Archive entry for the Inward K Snare.
Name: Inward K Snare
Family: K Based Snares (K)
Description: This sound is made by stopping airflow completely by putting the tongue against the soft palate, then pulling in a burst of air. Since air is coming in to the lungs it is called an ingressive sound. Air can be pulled in down past the center of of the tongue, or to one or both sides of the tongue.
Other Links: About the Human Beatbox Archives and Notation System