This is a passive electronic low frequency wind noise filter for the passenger position on the Honda GL-1800. In addition to reducing the actual wind noise that is heard thru the intercom system, this filter also helps the music mute sensitivity circuit to work better, making it easier to find a control position where the wind and background noise will not mute the music but voice frequencies will. Installation is a snap as this filter plugs in series with the passengers headset lead under the back of the seat.
