Why is there intermittent static in my exported file when there is none during editing?

Premiere Pro 6.0

Windows 7

I shot on a Canon t4i with a Sennheiser MKE 400 mic. I used the DSLR 1080p30 preset when starting project.

I used Denoiser and Dynamics compressor effects on the audio.

Exported to Youtube HD 1080p 29.97

I also exported to AVI NTSC DV

Both exports had the same result.

The audio sounds perfectly fine while editing in Premiere Pro. Static is only there in the exported file.

Here is a sample of the exported video: http://www.youtube.com/watch?v=3PyrcTfbSEg