How was the bird's characteristic vocalization often transcribed?

Answer

A series of loud, somewhat nasal calls transcribed as "kent-kent-kent"

The bird's call was frequently characterized as a series of loud, somewhat nasal calls, often transcribed as a "kent-kent-kent" sound given in groups of two to six notes.

How was the bird's characteristic vocalization often transcribed?
speciesbirdcharacteristicwoodpecker