Nope. Voice and music is very clear. Did you put water or anything inside the speaker?

 

This happens to me occasionally on my GS3 and Galaxy Nexus. It usually resolves itself by restarting navigation. I'm not sure what causes it, maybe slower internet speed? I wouldn't worry about it too much.

 

My wife and I cracked up laughing when that voice happened the first time when using our GPS.

It seems to happen when we are nearing a destination. It's almost like there was an earlier version of the voice that got accidentally left in the system.

 

You know, I think I've notice in navigation my phone switching voices! I thought I was crazy, but maybe not... It's usually a very nice voice, but sometimes the voice is the one I remember from my previous Android phone.

Someone else w/ same "problem": After upgrade to ics... Freaky navigation voice change and media duplicates? - xda-developers

 

I've noticed it a lot during navigation. They have a new, faster, higher-pitched woman talking (sounds like prerecorded wave files), then in the middle for a few words switch to a deeper voiced, lower pitched computer generated voice. Sounds really freaky.

Don't know if this is a result of a new Google Nav version or a Samsung thing or a ICS thing.

I call the regular-sounding one Sally and the deeper voiced one Mona. Wish Mona would go away and just let Sally talk, she's much more friendly.