alalex

The WP Sounds plugin allows you to easily insert sound buttons in your entries, from a big list of available sounds. Simple put the sound name between : and : to insert it.

WP Sounds

Insert cool sound buttons in your entries and allow your readers to do so in the comments as well

aueda

You can introduce the behavior of playing sound by hovering mouse pointer over an HTML element in an article and stopping the sound by moving the mouse pointer away from the HTML element.
(usage of file manager) 
You can associate sounds with HTML elements by writing shortcodes in an article. The parts of hortcodes are not displayed when displaying an article. Also you can put shortcodes anywhere in an article.
For more details, please see the document from the following URL: 
http://tempspace.net/plugins/?page_id=308 
(example)
<a id=”hr1″ href=”http://google.com”>Google</a> 
ABC 
<img id=”hr3″ src=$B!I(Jhttp://example.com/image.jpg$B!I(J>
[hoversound id=”hr1″ url=”http://example.com/sound1.mp3″] 
[hoversound id=”hr2″ url=”http://example.com/sound2.mp3″] 
[hoversound id=”hr3″ url=”http://example.com/music1.mp3″ autoload=”false”]

Hover Sound

You can introduce the behavior of playing sound by hovering mouse pointer over an HTML element and stopping the sound by moving the mouse pointer away …

WP Sounds vs Hover Sound