must be shaken to create vibration. Keyboard instruments fall into multiple categories. Pianos are a combination of percussion and strings. When a pianist plays a note, it causes an internal hammer to strike a string, which creates sound. Pipe organs, on the other hand, are more like wind instruments. They create sound when keys are pressed down, sending air through the corresponding pipes. The human voice is like wind instruments; the voice needs air to work. After the lungs fill up with air, the body releases that air through the vocal folds, which vibrate to create sound. The air then moves through the throat (pharynx) and out of the mouth. The pharynx also helps the sound waves to resonate and become louder.

String instruments like violins create sound by using something, like a bow, pick, or fingers, to pluck the strings and cause them to vibrate.



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