Nyong’o told Variety that spasmodic dysphonia was the inspiration for the character because she, too, was working through trauma.
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“We understand that hearing the unique sound caused by symptoms of spasmodic dysphonia was the spark of inspiration for the voice of this character.
Described as a “neurological disorder that causes involuntary spasms of the larynx”, this was the model for the voice which Nyong’o gave her character.