export interface SplitSentencesOptions {
    /**
     * Hard upper bound on the length of a returned chunk. Sentences longer than
     * this are broken apart, preferring comma / whitespace boundaries.
     *
     * @defaultValue 120
     */
    maxLength?: number;
    /**
     * Chunks shorter than this are merged with their neighbours, as long as the
     * merge stays within `maxLength`.
     *
     * Very short prompts ("はい", "なぜ?") make neural TTS models unstable, so
     * engines that suffer from it can ask for a floor. `0` disables merging.
     *
     * @defaultValue 0
     */
    minLength?: number;
}
/**
 * Split text into synthesis-sized chunks.
 *
 * Each returned chunk is normalized (see {@link normalizeText}), non empty,
 * and never longer than `maxLength`.
 */
export declare function splitSentences(text: string, options?: SplitSentencesOptions): string[];
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