I just installed an AFE stage 2 intake and TurboSmart Supersonic BOV on my 13 EB. When I let off the gas under boost (can be low or high) I hear a for lack of a better term "moan" then the BOV open up and I get the classic pshhhhhhtttt. It almost sounds like a dual stage BOV... The sound doesn't sound like chatter, its smooth. There is no air being forced back out of the intake when this happens either.

anyone else getting this sound with this setup?? Thoughts?

You can hear the sound really well at @ 1:21

 

 

I'm not trying to be funny, but it actually sounds like it's sneezing!

https://en.wikipedia.org/wiki/Blowoff_valve

This is from WIKIPEDIA. IMHO, I think the highlighted area should be taken into consideration!
A blowoff valve, (sometimes "hooter valve" or BOV) performs the same task but releases the air into the atmosphere instead of recirculating it. This type of valve is typically an aftermarket modification. The blowoff action produces a range of distinctive hissing sounds, depending on the exit design. Some blowoff valves are sold with a trumpet-shaped exit that intentionally amplifiesthe sound. Some turbocharged vehicle owners may purchase a blowoff valve solely for the auditory effect even when the function is not required by normal engine operation. Motor sports governed by the FIA have made it illegal to vent unmuffled blowoff valves to the atmosphere.

 

i googled bov sounds and theres some pretty strange and loud bov out there, seems like it personal preference when it comes to brand