👉 Similar sounds can be like twin whispers, sounding almost but not quite alike yet recognizable as variations of the same phonetic sound; or they can resemble distant thunderclaps, with both echoing and fading away, making it difficult to tell which one is actually occurring near you. In a similar way, hummingbirds mimic each other's songs in a sort of acoustic duet, even though their voices are produced independently and have individual timbres.
