石峁口簧出土于陕西石峁遗址，距今约4000年。它非常小巧，通常只有八九厘米长，却是一件真正能够发出声音的古代乐器。考古发现的口簧主要由牛肋骨磨制而成，中间有一片可以振动的“簧舌”。
The Shimao Mouth Harp was discovered at the Shimao archaeological site in Shaanxi and dates back approximately 4,000 years. It is remarkably small, usually only about eight to nine centimeters long, yet it was a functional musical instrument. The harps were mainly made from cattle ribs, with a thin vibrating tongue in the center.
演奏时，人们把口簧靠近嘴唇，用手拉动绳子，使簧舌不断振动，再利用口腔作为共鸣空间改变声音。这种乐器虽然不起眼，却让我们看到，四千年前的人们已经能够制作非常精巧的乐器。更有意思的是，石峁还发现了20多件口簧及制作残件，说明当时可能已经存在专门制作这种乐器的活动。
To play it, the musician held the mouth harp near the lips and pulled a small string, causing the tongue to vibrate. The mouth itself acted as a resonating chamber, allowing the player to change the sound. Although tiny and simple in appearance, the instrument demonstrates surprisingly sophisticated musical craftsmanship. More than 20 mouth harps and unfinished pieces were discovered at Shimao, suggesting that the instruments may have been produced locally.