接听电话时,很容易分辨出熟人的声音,这主要是根据声音的 来判断的;戴着耳机在嘈杂的公共场所听音乐时,往往需要增大音量,这是增大了声音的 ,若长此以往会导致听力下降.(选填“音调”、“响度”或“音色”)
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