如图所示是用一根吸管做的笛子,吸管上有五个孔,其中一个是吹孔

如图所示是用一根吸管做的笛子,吸管上有五个孔,其中一个是吹孔.嘴对着吹孔吹,由于吸管内空气柱发生_______产生笛声.用手指按住其他不同的孔吹笛,可以听到不同的声音,这主要改变了声音的_______.

答案

振动  音调 

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