We hear this bird almost nightly. I used this app to record it’s song to help identify it:
Recorded in backyard
Birdnet sent me to THIS Wikipedia page after identifying the song as being from a Chuck-Will’s-Willow. You can find a recording below the right details column
The Chuck-will’s-willow is often mistaken for the Eastern whip-poor-will which has a similar song.
You can compare the two here: