More is Not Necessarily Better…

Custom hearing aids—whether they are in-the-ear (ITE), in-the-canal (ITC), completely-in-the-canal (CIC), or invisible-in-the-canal (IIC)—have acoustic pathways between the receiver and the end of the bore that are on the order of 10 mm or less. This is also the case with occluding RIC style hearing aids. And this is also the case with in-ear monitors that musicians use.