What is "woofs"

Usage examples of "woofs".

The captain readily admitted how many planets they had surveyed, but not what the surveys had discovered: she discoursed on many matters - some of which were marred by the insertion of growls, snarls and woofs where the voder could not accommodate a translation.

Selfridge woofs on the bar and everybody jumps off their stools, right?

The two exchanged woofs, and the Damnation turned his head and pointed briefly to the south.