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Kindle Touch: screen refresh noise?

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Showing 1-11 of 11 posts in this discussion
Initial post: Feb 1, 2012 7:18:25 AM PST
Chris Murphy says:
Could somebody do me a favor and listen for "screen refresh" noise when you turn a page on your Kindle Touch?

I was reading in bed last night and noticed that I could hear page refreshes. I hadn't heard it before so don't know if something changed or I just never noticed it before.

To test this you will need to be in a quiet place. Please put your ear right next to the screen and simply touch it for a page turn. Of course I could also hear it last night in a normal reading position.

I realize e-ink refreshing is a physical phenomenon, but I would really like to know if it's normal.

Thanks in advance,

Posted on Feb 1, 2012 7:44:27 AM PST
How bizarre. I thought you were kidding, but you are absolutely right. There is a very faint 'click'. You have to be a bat, though, to hear it from more than 2 inches away!

In reply to an earlier post on Feb 1, 2012 7:49:53 AM PST
Chris Murphy says:
Weird, isn't it??

Though, like I said, last night in bed I could hear it while holding it an arm's length away! It was almost like a high-pitched squeal during the page-refresh I heard last night, in addition to the click. I think the high-pitched squeal occurs every 4-6 pages when the full refresh occurs.

Strange... only because I have read in bed a lot and never heard it before. So I didn't know if my KTouch was 'degrading' somehow.

Anyone else able to test it?


In reply to an earlier post on Feb 1, 2012 8:03:42 AM PST
Dragi Raos says:
I don't think my hearing is good enough to hear the little piggy hidden in my Kindle (and, presumably, performing the duties of an engineer)

I envy you!


Posted on Feb 1, 2012 8:31:08 AM PST
Interestingly, no sound at all from my Fire when I touch it.

In reply to an earlier post on Feb 1, 2012 8:52:38 AM PST
Chris Murphy says:
well, the Fire is not e-ink, and I think it has to do with refreshing the e-ink. E-ink particles are much different than an LCD screen like the Fire has.

In reply to an earlier post on Feb 1, 2012 9:13:21 AM PST
Dragi Raos says:
Neither from my K3 (KK) nor K2i, not a tiniest squeak. Then again, I certainly don't hear like a bat... :o)

Posted on Feb 1, 2012 9:15:08 AM PST
The eInk display changes by physically moving tiny charged particles of black and white pigment. While the sound generated from that movement would be tiny, it makes sense that some people could hear it. The refresh cycle is pretty high-frequency, so older ears like mine are probably immune.

Posted on Feb 1, 2012 9:46:07 AM PST
I posted something similar here a few years ago about my K1 and I also heard it on my K2 and K3. Several people agreed with me and others thought I was nuts. I assume that it's down to variation in people's hearing, not variation in Kindles.

In reply to an earlier post on Feb 1, 2012 9:47:44 AM PST
The screen electronics are pretty much the same across all those models. It's probably dependent most on your ability to hear high-frequency sounds.

Posted on Feb 20, 2012 3:44:45 PM PST
Incredible, but I tried and really listened the "click".
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Discussion in:  Kindle forum
Participants:  6
Total posts:  11
Initial post:  Feb 1, 2012
Latest post:  Feb 20, 2012

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