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mute speaker / trumpet

mute speaker
mute speaker

The volume of quarrel will be lessen by moving the handle of the Mute Speaker. And the quarrel alleviated as the volume of both sides subsided. Then, people will be gradually calm. Consequently,they can have a good communication. Therefore, we believe that using the Mute Speaker can decrease our family conflicts and bring our families more happiness.

University

Zhengzhou University of Light Indus

Zhengzhou University of Light Indus
Zhengzhou, China

Yi Qiao,
Zhengzhou University of Light Industry

Hongyu Yan,
Zhengzhou University of Light Industry

Hongjie Yi,
Zhengzhou University of Light Industry