Justin Bieber's lawyers call for dismissal of hearing damage lawsuit

Justin Bieber's lawyers are asking a judge to dismiss an Oregon woman's lawsuit against the pop star, insisting he has no way of controlling the noise at his concerts.

Stacey Wilson Betts launched legal action against the teenager this summer (12), accusing him of damaging her hearing.

Betts claimed the crowd noise and music at a Bieber show she and her daughter attended in Portland two years ago (10) were so loud, she was left with tinnitus, a constant ringing sound in her ears - which she still suffers from.

She is suing Bieber, his record company, the concert promoter and the arena where the show took place for $9.23 million in damages.

In court papers she stated Bieber "created a wave like effect of screaming by pointing into various sections of the arena... (He) then enticed the crowd into a frenzy of screams by continuously waving his arms in a quick and upward motion."

But, according to new documents filed by Bieber's legal team, the pop star had no way of knowing his actions would cause a so-called "sound blast".