Nokia N73 speaker fault

Problem:

While I make a call to someone all they hear is crackling sound but in return i can her them like crystall clear shouting at me " I can not hear you your in shower talking on the phone it's crackling up" this is realy getting annoying can this be repaired.

Solution:

1. try cleaning the mic first before replacing it..this usually does the trick..theres probably dust on the mic
2. Hi it sounds like a microphone problem - did you drop the phone or get it wet? to replace the mic will cost about $25-35