Throbbing Effect in a Singer's Voice

This page is the CodyCross answer for the clue below from Germany, Group 2200, Puzzle 5 (Berlin Film Festival).

Question is: Throbbing Effect in a Singer's Voice

and the answer is: VIBRATO

Word Meaning:

VIBRATO — (music) The musical effect or technique where the pitch or frequency of a note or sound is quickly and repeatedly raised and lowered over a small distance for the duration of that note or sound.

Definitions from Wiktionary.