After a suggestion by Environment Court Judge Jon Jackson in Alexandra yesterday, the Central Otago District Council will call expert witnesses to explain the effect noise may have on residents living near the proposed Project Hayes wind farm. He did so after learning from the CODC's counsel that no expert witnesses would be called to give evidence on other than landscape and visual effects, and planning. Judge Jackson and three commissioners will hear appeals on the council hearings panel's decision to recommend the wind farm, subject to conditions. At a conference of the participants and representatives yesterday, he heard there will be between 78 and 81 witnesses, and the case will begin on May 19. Parts may be heard in Cromwell or Queenstown.