No Keith only noticeable on certain words which then ruin the recording. I will have a look at that plug-in.
Yeah, you have to wait for a sale. The "Elements" ($129( version's Voice De-noise might be enough, but certainly, the "Standard" ($399) version's Spectral De-noise works on almost anything I've thrown at it. You might find some free de-noiser plug-in works fine for what you are doing, though.
, the problem with the recording I hear is just unclear articulation, and it's not noise that's masking it, but I'd guess a combination of the delivery and mic position/aim, which is not picking up those parts of speech (names I don't know, but our son, the linguistics major, could identify) that would make it clear. It is not what I would call a noisy recording. I would start by recording with the mic close enough to get a clearly articulated reading, then move it away a foot at a time, adjusting the aim to keep the sound clear. (And, adjust gain at the same time - next paragraph.)
I’m still a bit concerned about the gain "structure" you have set up. The sample recording is *very* low. You should shoot for a [true] peak of say -10dB, and you do that by adjusting the Trim (aka "gain"). That setting is something in the INPUT settings (referenced in my previous post), and is a linear number, that can be from +12 to +75dB. It is not controlled by the "fader" which simply changes what the output level is in the mix/headphones, likely with an audio-taper pot, (and the headphone amp on the Zoom field recorder is likely still one of their weak points). Then, make sure you are recording in at least 24-bit, though since you have the F6, I would certainly use 32-bit [float] mode. If you can't import that directly into your DAW, choose the Dual mode that includes both those settings. See some of the attachments.
p.s. you do want the HPF on for voice work, IMO.