What is "vocalising"

Usage examples of "vocalising".

Besides, after humming and vocalising the "Battle Hymn" six times, she had a headache, and there wasn't any equivalent of aspirin or ibuprofen, unless she wanted to chew willow bark, and that cure was probably worse than her headache.

He took a deep breath, and was about to modulate the venting, vocalising meaningfully, when a ferocious wall of air knocked him backwards out of his chair, denying him the chance.

The discordant vocalising of the drunk and disorderly in the next cell.