Keening

The keening whistle of the teapot signaled that the water was boiling.

The air raid siren's keening pierced through the city, signaling imminent danger.

The keening smell of rotten eggs filled the kitchen, indicating a gas leak.

The mournful tune played on the violin had a keening quality that brought tears to her eyes.

The melodious song filled the concert hall, evoking a keening nostalgia for a bygone era.

The mournful keening of the bagpipes added a somber atmosphere to the funeral procession.

The keening melody of the violin added a hauntingly mournful atmosphere to the music piece.