High pitched noise after receiving an email

So i was sitting at my desk, and I signed up at a website that sends you an email in order to complete the registration. my iphone got the email but I heard something afterwards that sounded like a high pitch. I was curious and sent another email to myself and the noise happened again. The noise doesn't happen if I put my sound half way down. Is this a good reason take my phone into the apple store to get it checked out? Is this a common problem with other people?

Christinme wrote:
yes, but my old 3g never did this and this one does.
So is this a new 3GS and not a 3G? Read on..........there are a number of threads concerning this, it would appear to manifest itself after more things than sending or receiving an email. Try listening after a text.
All the other problems occur during other times and no one has a solution or whether this problem could escalate into something worse like the speaker burning out or something.
It happens on most of the new units and I suspect it's something that Apple may be able to sort out with a software update. Just hold station and keep a look out for them. Alternatively if you are that concerned, take a trip to the genius bar.

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14-Aug-200707:27 AM
leon_plovdiv wrote:
14-Aug-200704:12 AM
psyxologos wrote:
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**When you rate a persons post, you are indicating a thank you or that it helped, but at the same time you are also helping to maintain the community spirit - You don't have to rate posts and you wont be looked down upon :) **

High pitched noise after receiving an email

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