The richness property defines the degree to which a voice will "carry."
number − The higher the numeric value, the more rich the voice and the further it will carry. A lower value will produce a voice which is soft and mellifluous.
object.style.richness = "80";
All the HTML elements
Here is the example −
<style type = "text/css"> <!-- *.chairman-kaga {richness: 80;} div.aside {richness: 10;} --> </style>