Intermittent Audio Output on iPhone 4S with iOS 7.1

I recently upgraded my phone to iOS 7.1. Since the upgrade my audio will play to a source for short periods, then stop. The audio source will still be outputting (i.e. Music will still be playing, not paused) but there will be no audio. This seems to be more common with the speaker, which is very annoying as I am missing messages and phone calls because they don't ring, but also happens with my wired headphones as well. If I am using the wired headphones when this happens, I can un-plug them, plug them back in and the issue resolves itself. However I cannot do this with the speaker for obvious reasons. Often when I am using the lock screen, the first few clicks will be audible, but the last one or two will not. Likely unrelated, my battery life has significantly been reduced by the update.

Thank you in advance for any help and suggestions,

Jason Murray