Strange sleep sound

[Effenpig!]

If I press the sleep button or whenever the phone screen shuts off it started making a really weird sound. I'm not sure how to describe it but it lasts about 3 seconds and sounds like a cross between a cicada and a star trek/space type sound effect. I shut down all themes thinking that might be it but no joy. Any ideas?

[Cowboy]

And you didnt mod in sounds files?

[Effenpig!]

No I haven't. It's reall strange. It just started today and I really thought my phone wad going to die the first time it happened. Also I haven't updated anything recently or added anything either

Update: I just found it doesn't do it if the phone goes to sleep by itself or if I press the sleep button when the phone is already on the lockscreen. It only happens when I press sleep while on the springboard

Any thoughts ?

[i.Annie]

Does it happen when you have it set on vibrate?

[Effenpig!]

No. It doesn't. But it does do it everytime it pushes my email and it freaks me out in the middle of the night.

[i.Annie]

I'm so sorry I just laughed really hard at the thought of that.

It is seemingly likely to be a hardware issue I'd think. Does it only do it for mail and sleep sound or does it do it for any other sound played?

[Effenpig!]

Well it's a really creepy sound to awake to, and I'm pretty sure it's the reason I had horrible nightmares last night, but.....

It's stopped, I don't know how or why but it just stopped doing it
????????

To answer your question though, it only happened when pressing sleep from the springboard or when email pushed through when phone was asleep

[i.Annie]

It heard you talking about it behind its back.

[Cowboy]

Yeah i couldnt figure out why it would do that other than maybe hardware like i annie said but atleast it stopped lol

[i.Annie]

Well I hope your sleep won't be disturbed again lol