# Worrying noise while running

**URL:** <https://forum.clockworkpi.com/t/worrying-noise-while-running/7401>\
**Category:** DevTerm\
**Created:** [November 17, 2021, 8:02pm UTC](https://forum.clockworkpi.com/t/worrying-noise-while-running/7401 "2021-11-17T20:02:00Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![turbowaffle](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/turbowaffle/32/4724_2.png) [@turbowaffle](https://forum.clockworkpi.com/u/turbowaffle)\
**Post date:** [November 17, 2021, 8:02pm UTC](https://forum.clockworkpi.com/t/worrying-noise-while-running/7401/1 "2021-11-17T20:02:01Z")

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I got things assembled and turned on, and immediately noticed a high pitched whine, reminiscent of a bad cap in a power supply. It doesn’t seem to be the fan, as the fan isn’t running, and I checked that it does turn freely. Any idea if this is indicative of an issue? I can live with it, I just don’t want something to blow up after being used for a few days. Short recording of it is at [Dropbox - cpi\_noise.mp3 - Simplify your life](https://www.dropbox.com/s/6pvay8irie5l5ud/cpi_noise.mp3?dl=0)

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**Author:** ![turbowaffle](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/turbowaffle/32/4724_2.png) [@turbowaffle](https://forum.clockworkpi.com/u/turbowaffle)\
**Post date:** [November 17, 2021, 9:50pm UTC](https://forum.clockworkpi.com/t/worrying-noise-while-running/7401/2 "2021-11-17T21:50:15Z")

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I’ve noticed this only happens when running on USB power. Running off the cells doesn’t seem to trigger the noise.

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**Author:** ![hotchalupa](https://avatars.discourse-cdn.com/v4/letter/h/4af34b/32.png) [@hotchalupa](https://forum.clockworkpi.com/u/hotchalupa)\
**Post date:** [November 17, 2021, 10:03pm UTC](https://forum.clockworkpi.com/t/worrying-noise-while-running/7401/3 "2021-11-17T22:03:52Z")

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Don’t quote me on this because I can’t seem to find the thread where I read this but I believe it was explained that while charging current takes a different path and whoever explained it mentioned why you’ll hear such noises. I can’t recall the exact explanation, which I realize makes my response super vague, but it is normal (mine does it as well).

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**Author:** ![kuba-a](https://avatars.discourse-cdn.com/v4/letter/k/e47c2d/32.png) [@kuba-a](https://forum.clockworkpi.com/u/kuba-a)\
**Post date:** [November 18, 2021, 7:41am UTC](https://forum.clockworkpi.com/t/worrying-noise-while-running/7401/4 "2021-11-18T07:41:26Z")

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It’s the speakers, noise from charging is coming from there.

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**Author:** ![yxt0531](https://avatars.discourse-cdn.com/v4/letter/y/f0a364/32.png) [@yxt0531](https://forum.clockworkpi.com/u/yxt0531)\
**Post date:** [November 18, 2021, 11:37am UTC](https://forum.clockworkpi.com/t/worrying-noise-while-running/7401/5 "2021-11-18T11:37:59Z")

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I had the same issue before, the noise went away after I tried a different USB power adapter. (same spec, both are 5V 3A, but different brand)

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**Author:** ![turbowaffle](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/turbowaffle/32/4724_2.png) [@turbowaffle](https://forum.clockworkpi.com/u/turbowaffle)\
**Post date:** [November 18, 2021, 3:00pm UTC](https://forum.clockworkpi.com/t/worrying-noise-while-running/7401/6 "2021-11-18T15:00:42Z")

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Thanks all, good to know it’s nothing to be concerned of!