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【题目】“中国好声音”比赛现场,吉他手弹奏电吉他时不断用手指去控制琴弦长度,这样做的目的是为了改变声音的______(选填“音调”、“响度”或“音色”,下同);有一种新型声纹锁,只要主人说出事先设定的暗语就能把锁打开,如果换了其他人,即使说出暗语也打不开,这种声纹锁辨别声音的主要依据是______;来自患者的声音通过橡皮管传送到医生的耳朵,这样可以提高声音的______

【答案】音调;音色;响度

【解析】试题分析:声音的特性有三个:音调、响度和音色.音调是指声音的高低,响度是指声音的大小,音色是指声音的感觉特性.

解:(1)弹奏吉时不断用手指去控制琴弦长度,从而改变了琴弦振动的快慢,也就改变了声音的音调.

2)不同人发出声音的音色不同,因此声纹锁主要是依据声音的音色来辨别主人的.

3)医生用听诊器为病人诊病,来自患者的声音通过橡皮管传送到医生的耳朵,这样橡胶管减少了声音的分散,提高了响度.

故答案为:音调;音色;响度.

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