The Mysterious Cartilaginous/Bony Ear Canal Junction

Research related to the occlusion effect (OE) suggests that the OE is minimized when contact of the ear insert (closed coupled in this case) is made with the bony ear canal1,2.  Measurements of the OE for various in-canal devices are numerous and essentially support this conclusion.  But, to what extent does the cartilaginous/bony ear canal…

Read More

Ear Impression Terms – Part 2

Terminology associated with ear impression material is sometimes confusing to those who take ear impressions on a routine basis.  This post continues the discussion on ear impression terms from a previous post. Compression Set   This is the amount of permanent deformation resulting when a material is compressed to a specific deformation for a specified…

Read More