No, not that kind of motorboating, but the audio distortion type.
(Now that I got your attention with the accurate but misleading title) After being out of town for a week and a half, I'm catching up on editing the sermon MP3 files from my church and getting them posted to a public google-docs folder. The one from last week has a low-pitched "chirp chirp chirp" with a fast rise time and slower decay that occurs a couple of times. No idea what it's from, but it's in both stereo channels. (I wonder if it picked up something from the ceiling fan) I'm trying to figure out how to filter it out using Audacity. If I could just clip it to the level of the speech that would help quite a bit, but I don't see any way to do that. Also didn't see anything useful in the noise filtering options.
Any suggestions? BTW, the file has a bit rate of 128kbps and a sample rate of 44 khz, I haven't downsampled it yet -- not sure if that matters.