Keening

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

The keening wail of the baby echoed through the nursery, causing concern among the caregivers.

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

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

The old television emitted a high-pitched keening noise whenever it was turned on.

The chilling keening of the banshee sent shivers down the spines of those who heard it.