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初中物理竞赛中,涉及声学部分的内容比例虽然不高,但是由于声现象和日常生活联系比较紧密,应用范围较广,利用声现象知识解释和计算实际生活问题逐渐成为竞赛的热点。下面结合典型试题对本部分进
In junior middle school physics competition, although the proportion of the part related to the acoustic part is not high, the sound phenomenon has become a hot topic in the competition due to its close connection with daily life and wide range of applications. The following combination of typical questions into this part