Second user accont loses sound.

I set up a second account for my husband and it loses sound frequently. I login to my account-the sound works, then login to his account -it doesn't. Not the mute/volume. We restart, it's fixed, hour later- off again.

I haven't tested it to see if it works if I completely logout of my account, I just thought of this as I was typing it, but is there a common problem with this? I can't find any settings to adjust, etc.

I'm not technical, but I can follow software step instructions if pointed in the right direction.

Thanks.