Need advice.  I have a 13 Month old Cocker Spaniel who 90% of the time is quite happy.  However, he is constantly barking at noises he hears outside, even if there is no-one there.  We now have a 3 Month old Daughter who's sleep patterns are being disturbed by this behaviour.
Also, when out walking, he gets really scared when he see's other people.  He backs away and even screams if someone tries to touch him. 

Any Advice would be appreciated.

When my Springer barks at outside noises I thank her - after all, she's just doing her job - then ask her to come to me and sit.  This breaks the cycle.....
For the fear issues he needs to be carefully socialised - have you considered taking him to training classes?