What are string instruments? They are aerophones(sound is aid of air and the vibration of the reed) They are chordophones(sound is the vibration of the string). Types of string instruments Plucking Hitting Rubbing. How the sound is made on the percussion? Hitting Hitting,shaking and scraping. What material are they made of the percussion instrument? Wood and sleid Wood sleid and metal. What are the pitch of percussion instruments? tuned untuned. What are the wind instruments? They are aerophones(sound is aid of air and the vibration of the reed) They are chordophones(sound is the vibration of the string). What are the types of wind instruments? Woodwind and brass Woodwind and metalwind. What are the types of reds in the woodwind instruments? embrochure single reed double red.