var voices = window.speechSynthesis.getVoices();
    setTimeout(function() { voices = window.speechSynthesis.getVoices(); }, 1000);

    function findVoice(lang) {        
        for (var i = 0; i < voices.length; i++) {
            if (voices[i].lang === lang) { return voices[i]; }
        }
        return null;
    }

    this.speak = function(s) {
        if (!window.speechSynthesis) { return; }
        var utterance = new SpeechSynthesisUtterance(s);        
        utterance.lang = "ru-RU";
        utterance.voice = findVoice(utterance.lang);
        window.speechSynthesis.speak(utterance);
    };