170 Hz is a Dutch film about the love of two deaf children. Although some dialogues are in Dutch, most of it is in Dutch Sign Language and subtitled. The film was first presented on the Dutch Film Festival in September 2011, and was released theatrically on 1 March 2012.
The title refers to the frequency of 170 Hertz, the highest frequency which still can be heard by main character Nick (e.g. the sound of a motor bike).