Thank you for your post Mmcshan3,
As per the description of your issue you might need to check the following link in order to perform a sample audio testing:
Intel® Wireless Display: How do I adjust the audio once I start to remote my laptop's content to a TV?
http://www.intel.com/support/wireless/wtech/iwd/sb/CS-031070.htm?wapkw=turning+off+wireless+display
I hope this helps