/**
 * useVoice Hook - React hook for voice interactions
 *
 * Wraps VoiceManager to provide text-to-speech and speech-to-text
 * capabilities with React state management.
 *
 * Requirements: 8.5
 */
export interface UseVoiceReturn {
    /** Speak text using TTS */
    speak: (text: string) => Promise<void>;
    /** Start listening for speech input */
    startListening: () => Promise<string>;
    /** Stop listening for speech input */
    stopListening: () => Promise<void>;
    /** Ask a question and get spoken response */
    ask: (question: string) => Promise<string>;
    /** Whether currently speaking */
    isSpeaking: boolean;
    /** Whether currently listening */
    isListening: boolean;
    /** Voice availability status */
    isAvailable: {
        tts: boolean;
        stt: boolean;
        both: boolean;
    };
    /** Set TTS language */
    setLanguage: (language: string) => Promise<void>;
    /** Set TTS speech rate (0.0 to 1.0) */
    setRate: (rate: number) => Promise<void>;
    /** Set TTS pitch (0.5 to 2.0) */
    setPitch: (pitch: number) => Promise<void>;
    /** Stop all voice operations */
    stopAll: () => Promise<void>;
}
/**
 * React hook for voice interactions
 *
 * @returns Object with voice control functions and state
 *
 * @example
 * ```tsx
 * const { speak, startListening, isListening, isSpeaking } = useVoice()
 *
 * // Speak text
 * await speak('Hello, how can I help you?')
 *
 * // Listen for input
 * const userInput = await startListening()
 * console.log('User said:', userInput)
 *
 * // Ask a question
 * const answer = await ask('What is your name?')
 * console.log('User answered:', answer)
 * ```
 */
export declare function useVoice(): UseVoiceReturn;
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