Loss of hearing that occurs or develops sometime in the course of a lifetime, but is not present at birth.
                                                            
                                                     
                        
                                                
                        
                        
                            loss of hearing that occurs or develops over the course of a lifetime; deafness not present at birth.
                                                            
                                                     
                        
                                                
                        
                        
                            loss of hearing that occurs or develops some time during the lifespan but is not present at birth.