itgoldman

This plugin shows on hover sub menus of recent posts, pages and custom post types. 
It’s a simple no-settings out-of-the-box solution for better productivity when using the wordpress admin.

ITG Admin Hover Menus

Shows on hover sub menus of recent posts, pages and custom post types.

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 …

ITG Admin Hover Menus vs Hover Sound