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Author:
Journal / Book Title:
Year:
Volume:
Issue:
o db you sheng yin ma
Author(s):
LUO Zhi
Pages:
89
-
90
Year:
2006
Issue:
Z1
Journal:
School Journal of Mathematics
Keyword:
声强级
;
声音
;
频率
;
响度
;
振动
;
声波传播
;
条件
;
达人
;
物体
;
同学
;
Abstract:
<正>有些初中物理资料在讨论人听到声音的条件时,列出了必须满足的下列条件: (1)一定要有正在振动的物体,即发声体. (2)振动的物体和人耳之间必须有能够传播声音的介质.
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