The user can rate the Voices of the Speaker by Listening.
You need to get registered with the App, you will be given a User Id and Password.
Read the following Instructions Carefully before you start the App. After reading the Instructions carefully, you will be seeing 4 Buttons, on clicking the buttons you can hear the voices, after hearing all the 4 voices you will be redirected to another page where you can hear the voices for the last time.
After hearing the 4 voices for the 2nd time you will be redirected to the rating Page.
You have to rate the speakers with the Stars. The one with the highest stars is the best Speaker. You cannot rate same stars for other Speakers.