As a general matter, Wisconsin's electronic surveillance control law (Wisconsin 968.31) criminalizes the intentional interception, use, disclosure, or alteration of any wire, electronic, or oral communication.

"Electronic communication" means any transfer of signs, signals, writing, images, sounds, data or intelligence of any nature wholly or partially transmitted by a wire, radio, electromagnetic, photoelectronic or photooptical system. "

Question: Does this statute apply to just visual recording (without audio), such as on a surveillance camera? I thought the statute only applied to audio, but it says "transfer of...images" underlined above, so now I'm not sure. Do images mean still images?

Please explain and cite with Wisconsin-specific support.