The study - which involved composer Peter Kaye at Kingston University, London - looked at the music in films, as well as special effects and screams.
The analysis showed that horror films had the most noisy female screams - while adventure films had the most screams from men.
Horror films also had an higher than expected number of abrupt shifts up and down in pitch .
Dramatic films had fewer than expected screams and lower pitched sounds than other genre of movie.
The study later concluded that the use of these non-linear sounds was not random - but used to 'enhance the emotional impact of scenes'.
'Non-linearities are commonly produced when animals are under duress, such as the fear screams produced when animals are attacked by predators,
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