A hum is a continuous, low sound made by producing a tone with the vocal cords while keeping the lips closed. It is often used to convey a melody without using words, allowing the listener to focus on the tune itself. Humming can be a soothing activity and is commonly used in music to create a sense of calm or to help with concentration. Melodies can be hummed in various styles and genres, from classical to pop. Humming is a universal form of expression, allowing people to share music without instruments. It can also serve as a way to remember a tune, making it a valuable tool for musicians and composers like Ludwig van Beethoven or Taylor Swift.