Yeah, that's in the game, but it just happens when you walk past the old electric towers. Although it's a creepy sound, first time I thought it was gonna fall over me!

Thanks for all the reactions.... Still no explanation or sound a like... Maybe a little more exposition it does have something of a dopler sound feel to it...

are you talking about the sound at the good springs cemetary when you first approach your grave?

haha nvm answered my own question in original post

In FNV I hate walking around at night because just my luck there always a death claw or cazador right behind me and some random people chasing you so i usually sleep en till the day because it is weird at night

lol go tray stalker clear sky and call of pripyat night time in there is scary as [censored] and with some mods its even worse but new vegas nights are just normal besides the freaky music some times

I know what your talking about, I'm pretty sure its supposed to be those tall metal telephone poles creaking

No It's not that... (being familiar with it's real life equivalent) It is clearly a designed ambient sound.. In other words it is not part of the natural world. To make matters clear.. Your radio has to be off... and it it can be heard (occasionally) anywhere in the mojave....except for The Strip.... Only at night. It is not tied to certain locations..... though is triggered more around the Nipton, Novac, Camp Forlorn Hope triangle.
I know it sounds vague..., the best way to compare it is the whaling sound created for the original Alien Trailer (1979) (in design and feel)
For reference:
http://www.youtube.com/watch?v=bEVY_lonKf4 (around 0:49)
http://www.youtube.com/watch?v=r-EZC5zn2Fk&feature=fvst (around 0:31)

And yes it freaks me out every time I play without ze radio...


(Yes big alien fan For the record Alien, Aliens and Alien III don't care for either resurrection or the garbage called AvP)

I played with the radio entirely off for months and spent a lot of time in Novac area at all hours since I used it as a home base, and I don't remember hearing anything that would remind me of a weird phone chirp or like in that Alien clip.

I tried just standing around in the game for 30 minutes the other day and all I heard was the wind, owls, crickets...the usual. :/

Is it something like this one? http://mediahall.crimsonkeep.com/displayimage.php?pid=182 /// (alternate http://crimsonkeep.com/downloads/sounds/amb_r_creaking_10.mp3 )

That's under amb/regions/city/creaking.

Or under amb\amb_desertdefault\distantmetal - http://mediahall.crimsonkeep.com/displayimage.php?pid=183 /// (alternate http://crimsonkeep.com/downloads/sounds/sfx_desert_nightfx_os_04.mp3 )

There's also plenty of insect/animal/bat/centaur etc. noises that are pretty weird/not what you might expect.

Nope and nope...
Let me get this clear.. it's rare... and scary.. and it definitely is not part of the soundtrack... (ie music)... It is a random sound.. and trust me I can discern the other sounds (no offence intended). This one stands alone it is a designed sound (possibly scare tactic)
(for the love of god though I can find mentions.... no one has, seemingly, posted this or something alike on youtube grrrmbl)

Those aren't part of music tracks, btw. They're sound effects.

Are you on PC or console? If PC, you can extract all the sound effects from the bsa think someone else mentioned that) and search for it yourself. If you're on console you can PM me and I can give you a link to a zip file that has them all.

whatever the noise is the OP is hearing that distantmetal file sounds creepy like the wailing of some huge creature gives me deadspace flashbacks actually OP might need a plasma cutter if this is the noise

This reminds me of when you're exploring and the ambient music would drop down a bit and you'd hear a Goblin-esque 'Ha-ha-ha.'

Very creepy, especially in The Divide.

Ghosts. Commie ghosts what don't know they're dead.

im so interested to this topic !! more!!!

I'm always listening to my radio so I barely ever hear the ambience, but when I don't has my radio I hear, air raid sirens.

Are you talking about the air raid siren sound?

is it perhaps that noise that sounds sorta like coyote's?

Is this ambient http://www.youtube.com/watch?v=Ot3T5ac_Dq4 playing when the weird noise happens?

Bring all your weapons, bring your convictions...
Your flag of the bull, two-headed bear......or whatever flag you're carrying now...


That song used to just make me think of Freeside. Never again.

Well thanks to http://www.gamesas.com/user/644125-ladycrimson/ I got the soundpackage..
I'll do some digging and get back to you all...

Yeah, I get that all the time.

I always assumed the game messed up the soundtrack for the Mojave and the Sierra Madre, It sounds similar.

Well sorry it took so long...
I have concluded it must be a hidden script... Why.... well after listening to the sounds.. it seems to be a scripted follow up of animal screams (deathclaw with Gekko) and with an added Doppler effect..
In other words... it is not a sound as such

So, is it real or not? Maybe it's in your head, after playing too much Fallout? I also tried to listen at night, for a weird sound, but just got the usual ambient sounds and music. lol

My Xbox is currently broken and I really want to hear this sound! I also think I know what you're talking about but I'm most likely wrong. Try and videotape yourself playing!

Sounds like the UFO approaching sound gone glitched or that silent desert/tumbleweed blowing sound.

The latter is like a long whistle.