Acoustic attack or mass psychogetic illness?

The US has issued a health alert after a consulate official in China suffered a mysterious brain injury. The illness is similar to that experienced by several US diplomats in Cuba last year, which led to a massive diplomatic fallout and concerns an 'accoustic attack' had taken place. Robert Bartholomew, who teaches at Botany Downs Secondary School in Auckland, is an expert in mass psychogenic illness. He suggests the mysterious symptoms are more psychological than the result of an attack.