How are vibrations made in a oboe?

African Blackwood

Composite (plastic) or grenadilla (African Blackwood)

An oboe can be made at of wood, plastic, ebony or even metal. Classically, the oboe is made of Grenadilla wood (African Blackwood), though Rosewood is becoming more common as the supply of Grenadilla...

Oboe keys and workings are made of metal, sometimes silver, and the oboe body is made of plastic for beginners, and the best ones are made of wood, and need extra care.

Traditionally it was made out of wood but knowadays you can get one's made out of plastic. Wooden one's are nicer to play but sadly more expensive.