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phon n.【物理學】方〔響度單位〕。

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The sound level produced from your booth shall be limited to no more than 80 phons , as measured at a point 2 meters away from the border line of the booth 自己展間的產生音量規定值為:從離開展間邊界線2 m的地方進行測量,測定值在80phon以下。

Smile whenever you pick up the phon , for the caller will be able to notice it 無論什么時候打電話,拿起話筒的時候請微笑,因為對方能感覺到!