Having had my '05 Elise 11 years, this is a new event for me. Upon startup, after Winter storage, with the car running, I bumped the horn button getting back in. A strange "ringing bell" like sound, and high frequency sound started up, and continued thru the drive back to my house. Once in the garage, with car shut off, the sound continued, coming from the front clam, under the rad. I pulled the battery ground, without killing the sound. Next, pulled both fnt. clam vent covers and the grill, to see if I could find whats going on. It seems to be coming from the driver's side, behind that front crash structure. After about 40 min. it finally stopped. Any help will be appreciated. I have a video, that I can't get to upload here, but hope someone can help! Thanks!