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    【题目】随着科学技术的不断进步，一种新型锁——“声纹锁”已经面世，只要主人对着“声纹锁”说出事先设定的暗语，它就会自动打开，别人即使说出相同的暗语也打不开，这种“声纹锁”辨别声音主要是依据（ ）

    A．音色B．响度C．音调 D．声速

    【答案】A

    【解析】

    试题分析：音色：发声体的声音品质，由发声体本身的特征决定．是区别声音的重要标志．只要主人对着“声纹锁”说出事先设定的暗语，它就会自动打开，别人即使说出相同的暗语也打不开，是由于主人的音色与其他人的不同。

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