Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Overblowing the Flute

吹管乐器过吹

The flute is overblown to its second or third harmonic by a combination of increasing the airstream velocity and "rolling in" to decrease the gap between the players lips and the edge. Even higher harmonics can be produced, as demonstrated here.

长笛可以通过增加气流速度和“向内缩”以减小嘴唇与管口边缘之间的间隙，从而吹奏出第二或第三谐波。更高阶的谐波也可以被产生，如此处所演示的。
Discussion of overblowing
过吹讨论
Video example: overblowing to the octave
视频示例：吹奏到八度

Thanks to Sara Booker for helping to demonstrate the instrument and to Tim Merritt of GSU's Instructional Resource Center for assistance with the video.

感谢Sara Booker帮助演示仪器，以及GSU的Instructional Resource Center的Tim Merritt在视频方面的协助。
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