protected function getAudioData()
    {
        if ($this->no_session != true) {
            if (isset($_SESSION['securimage_code_audio'][$this->namespace])) {
                return $_SESSION['securimage_code_audio'][$this->namespace];
            }
        }

        if ($this->use_database) {
            $this->openDatabase();
            $code = $this->getCodeFromDatabase();

            if (!empty($code['audio_data'])) {
                return $code['audio_data'];
            }
        }

        return false;
    }