一般在自由空间中,距离每增加一倍,相应的声压级将减少()A:1dB(A)B:5dB(A)C:6dB(A)D:10dB(A)

作者: rantiku 人气: - 评论: 0
问题 一般在自由空间中,距离每增加一倍,相应的声压级将减少()
选项 A:1dB(A) B:5dB(A) C:6dB(A) D:10dB(A)
答案 C
解析 判断声源的距离主要依靠声压和主观经验。在自由空间,距离每增加一倍,声压级将减少6dB(A)。
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