Noise music is a special type of music that uses noise as the main part of the song .
Noise music can feature distortion , various types of acoustically or electronically generated noise , randomly produced electronic signals , and non-traditional musical instruments . Noise music may also incorporate manipulated recordings , static , hiss and hum , feedback , live machine sounds , custom noise software , circuit bent instruments , and non-musical vocal elements that push noise towards the ecstatic .