Keening

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

The keening screech of the brakes startled the pedestrians on the sidewalk.

The abandoned graveyard was filled with the keening of the wind passing through the tombstones.

The keening of the steam whistle signaled the departure of the train from the platform.

The keening tone of his voice conveyed the depth of his heartbreak.