Once transformed, the phrase often continues to be perceived as song, and its musical melody cannot be “unheard” ( Groenveld, Burgoyne, & Sadakata, 2020). musical signals, recruiting a network of areas associated with pitch extraction, song production, and auditory-motor integration ( Tierney, Dick, Deutsch, & Sereno, 2012).
The transformation usually occurs during the third repetition of the phrase ( Falk, Rathcke, & Dalla Bella, 2014) and is accompanied by a change in activation of the involved neural circuits that process spoken vs. This transformation indicates a tight link between language and music and has attracted much research attention since its discovery ( Deutsch, 1995).
#Sonority hypothesis series
The speech-to-song illusion is a perceptual phenomenon in which a spoken phrase shifts to being heard as sung by listeners after a series of repetitions. Two experiments show that STS is facilitated in high-sonority sentences and in listeners’ non-native languages and support the hypothesis that STS involves a switch between musical and linguistic perception modes. Such prosodic re-analysis places demands on the phonological structure of sentences and language proficiency of listeners. The present study investigates these questions with French and English listeners, testing the hypothesis that the transformation is achieved by means of functional re-evaluation of phrasal prosody during repetition. To date, existing evidence is insufficient to predict who is most likely to experience the transformation, and which sentences may be more conducive to the transformation once spoken repeatedly. It may result partly from linguistic properties of spoken phrases and be partly due to the individual processing difference of listeners exposed to STS. There is a great deal of variability in the perception of the speech-to-song illusion (STS).
Yet when a spoken phrase is repeated several times, they often report a perceptual transformation that turns speech into song. Listeners usually have no difficulties telling the difference between speech and song.
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