![]() ![]() Specifically he does this by shouting under a gushing waterfall. In the film, the dad demonstrates to his frightened son how, in certain environments, making a noise will not alert the creatures. Masking soundsĪ second auditory distraction phenomenon shown in the film has also been observed in the real world. The noise was clearly a change from the aliens’ usual environmental sounds. The trees rustle, as the aliens have presumably been alerted by the sound, and the father rushes towards his child. The aliens in A Quiet Place rely on deviant sounds to alert them to their prey: when one of the children switches a toy space shuttle on it suddenly emanates a lot of noise (see the trailer above). In each of these cases, performance on a short-term memory task is significantly impaired compared to when there is background noise with no deviant sounds. ![]() Compared to the rest of the sound sequence, a deviant sound can be temporally different (presented at the rate of half a second compared to one second), have a different pitch (male voice compared to female voice, for example), or be semantically different (such as hearing one’s own name). Laboratory research has shown this very same effect in different ways. If the baby hears a sound on their right-hand side, they will turn their head towards it, and so are no longer attending to their parent. Consider the example of a baby lying on the floor, looking up to the left at its parent. More specifically, any auditory item that deviates from an expected sequence of sounds is able to capture attention via a physical orienting response. It is when an unexpected or unpredictable sound captures one’s attention. The explanation of the deviance effect is conceptually quite intuitive. It alerts us to potential changes in the environment that might indicate, for example, a threat to survival or a possible food source. It is an evolutionarily adaptive function that we share with many other animals – and, in the Quiet Place universe, with alien creatures. The second route is called the deviant effect. ![]()
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