“开水不响,响水不开”,这是人们从日常生活中悟出的道理.意思是说:烧水时,在水被烧开之前,有一段较长时间发出“轰隆轰隆”较响的声音(没有生活经验的人以为水被烧开了);待烧开后,只发生“嘶嘶嘶”较弱的响声.我们知道,反映声音的三个特征是:音调、响度和音色,其中响度就是人 “The boiling water does not ring and the water does not turn on.” This is the reason people realize from everyday life. It means: When water is boiled, it will be a long time before the water is boiled. The voice (people without life experience thought that the water was boiled); after the boil, only the weaker sound of “squeaking” occurred. We know that the three characteristics reflecting the sound are: tone, loudness, and tone. The loudness is human