the example of https://github.com/zlargon/voc

voc-example.js

var voc = require('voc-cli');

/* voc
 *
 * @param  {String}   word
 * @param  {String}   directory       the location for download
 * @param  {String!}  service
 * @return Promise(audioPath: String)
 */

var word = 'Hello World';
var path = '.';             // current directory
var service = 'google';     // Dictionary     => 'webster', 'collins',  'yahoo'
                            // Text-To-Speech => 'ispeech', 'voicerss', 'google'
voc(word, path, service)
.then(function (audioPath) {
  console.log('Download to ' + audioPath);
})
.catch(function (err) {
  console.log(err);
});