"Yu Yin" is a user and product can interact with the sound. The main body of the stereo is like a narrow room, and the volume adjustment panel is like a window. When the windows were closed, music echoed through the room. However, when the window was gently pushed open, the music began to float out from the window. As the windows get bigger and bigger, the sound of wearing out gets louder and louder. The user can gently push the window to turn the volume up or down. The user can judge the size of the volume by observing the scale on the speaker board, so as to better control the playing effect of the music.

Author: Mai Mai spicy leg fort
Guidance: Tienvy
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