How to remove white noise at beginning of clip

I am having trouble removing the white noise from the beginning of my audio clips in Premiere Pro.  I've added a denoise effect to the audio track mixer but am still getting a hissing/ white noise sound every time he begins to speak.  I've tried YouTubing the problem and searching the Adobe community forums and am unable to find a resolution.  

Any help would be appreciated.  Attached is a clip of the audio I am referring to.