58. 分贝荒谬谈 episode artwork

EPISODE · May 25, 2025 · 9 MIN

58. 分贝荒谬谈

from 知为谁 · host 知为谁

这段文字对分贝(dB)这个看似简单的科学单位提出了批评,指出其定义混乱且不直观。文章解释说,分贝并非传统的测量单位,而更像是表示数量变化的对数前缀,其值取决于底数单位和参考点。作者通过功率与电压关系的例子,以及声学和电子学中的不同应用场景,详细阐述了分贝在实践中存在的多重含义和不一致性,强调其缺乏清晰的规范,使得理解和使用变得复杂。文章也提到了分贝的历史演变,从最初表示10倍变化的“贝尔”单位,到后来为了更精细测量而细分的十分之一的“分贝”。内容来源:https://lcamtuf.substack.com/p/decibels-are-ridiculous

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58. 分贝荒谬谈

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