我们的电子设备偶尔会发出意想不到的、极其恼人的噪音，让我们大吃一惊，因此找到解决办法是当务之急。但是，当所有常见的“嫌疑犯”都不是问题的起因时，你会怎么做？今天的超级用户问答帖子为绝望的读者提供了一些有用的建议。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

问题

超级用户读者Szabolcs想知道如何消除笔记本电脑上非硬盘驱动器、与风扇无关的嗡嗡声：

I have a new Dell Inspiron 15 7547 laptop and it makes an annoying high-pitched buzzing sound whenever running on AC power.

This is not HDD noise (there is a separate normal sound when the HDD is working). It is not fan noise (that is also present and it is different/quieter). It is also not coming from the speakers (the noise does not respond to volume control).

The buzzing noise is correlated with CPU usage. Low CPU usage results in a loud noise while high CPU usage results in no noise. For example, continuously scrolling in the browser will shut it up.

I know that electronic components can make noise, and I believe that this is the case. Is there anything I can do to shut it up? The buzzing is just as loud as the HDD’s noise, but it never stops and becomes really annoying.

有没有办法让这种恼人的嗡嗡声安静下来？

答案

超级用户贡献者Josip Medved和Roger为我们提供了答案。首先，Josip Medved：

As the noise is connected to the load (and thus current c***umption), this might be a case of a noisy DC-to-DC converter whose switching frequency falls into the audible range.

It is hard to tell whether it is serious or not, but I would definitely look into replacing the laptop if it is still under warranty as a big shift in DC-to-DC switching frequency can quite often have an impact on the voltages it generates.

Even if it is currently working without problems, you might find some of more sensitive components just dropping dead one-by-one over the long-term.

接着是罗杰的回答：

I think I had the same problem a while back. When the CPU is working at full speed, it is silent, but when the workload is lower, the CPU goes into power-saving mode. That is when it started making noise.

My problem was solved by switching off D-States in the BIOS. Amazingly, neither the computer support at our company nor the two engineers DELL sent out to fix the noise could solve my problem. Luckily, I found the answer on the Internet.

有什么要补充的解释吗？在评论中发出声音。想从其他精通技术的Stack Exchange用户那里了解更多答案吗？在这里查看完整的讨论主题。