The authors of a new report conclude that the only solution to noise annoyance from motorized water skis is an outright ban. Charles Kamanoff and Howard Shaw found that at an average beach, recreationists say they'd pay $47 to shut up one noisy machine for the day. To order a free copy of Drowning in Noise: Noise Costs of Jet Skis in America, call the Noise Pollution Clearinghouse at 888/200-8332 or e-mail npc@nonoise.org.