iBT TOEFL Topic Vocabulary Breakthrough Unit 038

iBT TOEFL Topic Vocabulary Breakthrough Unit 038
Author: Li Xiaolai

38. Percussion instruments are referred to as membranophones if they produce sound through the vibrations of a stretched skin or other membrane. They are called idiophones if they produce sound through their natural resonance when struck, rubbed, plucked, or shaken. Drums are membranophones; hollowed logs, bells, gongs, xylophones, and pianos are examples of idiophones.

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