Ice hockey is one of the few sports along with box lacrosse or indoor soccer in which an air horn, car horn, train horn, foghorn, or siren is used to celebrate a goal. In every NHL arena, the horn blares after each home team goal. This has been a trend since the 1973 Stanley Cup Final against Montreal, as Chicago Blackhawks owner Bill Wirtz had the horn of his yacht installed in the Blackhawks' Chicago Stadium home rink, and had it sound after Blackhawks goals. This practice would, in the ensuing years, become commonplace in professional hockey. The only exception to this rule is during the NHL All-Star Game, where the role of that sound is expanded to cover every goal scored, and that the horn only sounds once. The horns are different depending on the teams, some even have sound effects such as an alarm or the foghorn of a ship, or both combined, for the Washington Capitals and the Anaheim Ducks. Hockey fans have said that the loudest goal horn belongs to Anaheim, who have a very loud fog horn with high bass, or the Philadelphia Flyers, who have a very loud ship’s signaling horn. Also, during the 2006 Stanley Cup playoffs, the Edmonton Oilers added a second set of horns to the original horn for the second round. The reason was for that the Oilers had sold out games and the noise level was so loud, that the original horn was getting drowned out by the crowd. The result was a very loud horn used for the rest of the playoffs.