/**
 * Word boundary information
 */
export interface WordBoundary {
    /**
     * The word text
     */
    word: string;
    /**
     * Start time in seconds
     */
    start: number;
    /**
     * End time in seconds
     */
    end: number;
}
/**
 * Estimate word boundaries for a given text
 *
 * This is a simple estimator that assumes a constant speaking rate.
 * It's not accurate but provides a reasonable approximation when
 * the TTS engine doesn't provide word boundary information.
 *
 * @param text Text to estimate word boundaries for
 * @param options Options for estimation
 * @returns Array of word boundary objects
 */
export declare function estimateWordBoundaries(text: string, options?: {
    wordsPerMinute?: number;
    startTime?: number;
}): WordBoundary[];