Asklemmy

43850 readers

1244 users here now

A loosely moderated place to ask open-ended questions

Search asklemmy 🔍

If your post meets the following criteria, it's welcome here!

Open-ended question
Not offensive: at this point, we do not have the bandwidth to moderate overtly political discussions. Assume best intent and be excellent to each other.
Not regarding using or support for Lemmy: context, see the list of support communities and tools for finding communities below
Not ad nauseam inducing: please make sure it is a question that would be new to most members
An actual topic of discussion

Looking for support?

Looking for a community?

Lemmyverse: community search
sub.rehab: maps old subreddits to fediverse options, marks official as such
[email protected]: a community for finding communities

~Icon~ ~by~ ~@Double_[email protected]~

founded 5 years ago

MODERATORS

[email protected]

399

Do you often hear the ringing of switching power supplies and devices when you are in a quiet space? (lemmy.world)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]

148 comments fedilink hide all child comments

I'm curious, how many people are aware of these sounds. I have designed, etched, and built my own switching power supplies along with winding my own transformers. I am aware of the source of the noise. So, does anyone else hear these high frequency sounds regularly?

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 1 points 8 months ago* (last edited 8 months ago) (1 children)

My main laptop is making similar noises all the time, I think they come from the CPU.

[–] [email protected] 5 points 8 months ago (2 children)

The CPU itself doesn't produce sound, but inductors (coils) can. Therefore, when you move the mouse, the CPU power increases, potentially causing inductors to go into resonance.

[–] [email protected] 1 points 8 months ago

Graphics system usually. Back in the day I used to be able to tell where on the screen the cursor was from the pitch of the coil whine.

I buy better hardware nowadays 😂

[–] [email protected] 1 points 8 months ago

I thought it was maybe some kind of audio chip interference coming from the CPU as it's not tied to cursor movement in my case