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Whistle and stopwatch are the necessity of referee. As we known, hearing the whistle and then starting the time always existing timing error. Time whistle, which combine the whistle and stopwatch, starts timing when the whistle went, so it can improve the accuracy of timing. It’s convenient to use. And it gets blowing the whistle and timing functions concurrently.
Shenzhen University
Shenzhen, China
Li Dan,
University of South China Hengyang / China Industrial Design( SIX DESIGN STUDIO)
Bo Le,
University of South China Hengyang / China Industrial Design( SIX DESIGN STUDIO)
Liu Jian,
University of South China Hengyang / China Industrial Design( SIX DESIGN STUDIO)
Zhou Jun,
University of South China Hengyang / China Industrial Design( SIX DESIGN STUDIO)
