Thought Microsoft PowerPoint offers no direct way to extract images or audio files from PPT files, you can still save these embedded objects in three simple steps:
Step 1: Open the PPT or PPS file inside Microsoft Powerpoint and choose File -> Save As.
Step 2: From the "Save As type" drop down, choose the Web Page format (*.htm, *.html). Type a file name and click save.
Step 3. Open the file folder where you saved the Presentation as HTML and there you'll see another subfolder with the same name.
That's the magical folder - open it and you'll see tons of JPEGs, HTML and WAV files there which were actually used in the original Powerpoint presentation. One of the WAV files here is probably what she is looking for. Happy Hunting.
Bonus Tip: When you save your presentation as a Web page, PowerPoint creates a folder that contains an .htm file and all supporting files, such as images, background textures, sound files, cascading style sheets, scripts, and more. Save your presentation as a Web page when you want to edit it with an HTML editor, and then post it to an existing Web site.