Patent ID: 9628925
Date: 2017-04-18
CPC Classifications: G10K,H04R

Claim:
1. An ear canal earpiece comprising: an electroacoustic sound transducer; a first sound guide unit configured to guide sound from the electroacoustic sound transducer; a second sound guide unit configured to prolong the first sound guide unit; a third sound guide unit which surrounds the second sound guide unit and guides sound further to an ear canal of a user and a sound wall which extends between the second and third sound guide units, wherein the sound wall is arranged at an end of the third sound guide unit remote from an ear-facing end of the third sound guide unit, wherein the third sound guide unit is in form of an otoplastic means, wherein an outside contour of the third sound guide unit is substantially matched to an inside contour of the ear channel of the user, and wherein, in an entire region of the third sound guide unit, a ratio of an acoustically effective cross-section area to a total cross-section area of the outside contour of the third sound guide unit is greater than 40%.