Patent ID: 6748093
Filing Date: 2004-06-08
Classification: B33Y,H04R

Abstract:
A method for computer controlled production of a hearing aid housing with a face plate and a shell, comprising the steps of:acquiring data representing the shape of the auditory canal, forming in a computer and based on the data a three-dimensional model of a hearing aid shell with a shell surface matched to the shape of the auditory canal, modifying the three-dimensional model by increasing the outer dimensions at selected areas of the shell surface to establish a shell model with a tightening protrusion at least partly encircling the shell surface and adapted for providing a tight seal against the auditory canal wall when the shell is inserted in the auditory canal, performing a computer controlled production of the shell based on the shell model, and fitting the shell with a faceplate to provide a hearing aid housing wherein the position of the tightening protrusion is selected to correspond with a position in the auditory canal at which user activity caused dynamic variations of the auditory canal are small.