Difficulty hearing through both earphones or audio cutting in and out is a common symptom of some form of problem with the device’s headphone jack. Test the connection with a few different pairs of earphones to ensure they are not the issue. If not, then a replacement will be the most cost effective solution.
If the replacement is in need then bring your iPod 4th gen down to our store and we will get it running as good as new. Call 1300 046 363 to enquire today!