title: Calculate the percentage of accuracy with which user made the assigned sound
body: <p>I want to design a web-app for my cousin who is 2 years of age in which i have implemented a functionality in which when an image is clicked some sound gets played and the user has to make the same sound which gets recorded.<br><br>
  For eg-If i click on image of &quot;Apple&quot; the sound made is &quot;A for Apple&quot;.Now the user has to say those words which get recorded.<br>
  Now I want to <strong>calculate the percentage of accuracy with which the user spoke</strong>.I want to know how can i know the accuracy percentage.I have not used machine learning or Natural Language Processing earlier so i want some guidance on what should i learn about or ways of implementing this functionality.I need some help on that.<br><br>
  Also use nodejs frameworks quite frequently so is there any module in nodejs with the help of which the above requirement can be fulfilled.</p>