In "The Legend of Sleepy Hollow," Washington Irving says Ichabod Crane's voice "resounded far above all the rest of his congregation." This statement is an example of Ichabod's

It is an example of Ichabod Crane’s vanity.

In that particular scene, he was dressed in an excessive manner, or in a fancy way. Perhaps it was just that he had a high opinion of himself that’s why he had gained a lot of confidence to speak louder.