Keening

The keening whistle of the tea kettle signaled that the water had boiled.

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

The keening notes of the bagpipes resonated through the air during the memorial ceremony.

The horror movie was accompanied by a soundtrack of keening voices, adding to the creepy atmosphere.

The lonely lighthouse emitted a keening beam of light that swept across the dark sea.