An illustration of a musical instrument emitting high-frequency sound waves, symbolizing the concept of '音频' which refers to the frequency of sound produced, indicating the number of vibrations of sound waves within a certain period of time. The higher the frequency, the higher the pitch of the sound; conversely, the lower the frequency, the lower the pitch. The image should focus on showcasing how this instrument produces high-frequency tones, typically used for playing high-pitched musical pieces. The style should be vibrant, with detailed emphasis on the instrument and the sound waves it produces.
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