Trenched sealing retainer for canal hearing device

A retaining seal assembly for a hearing device, comprising:

• a plurality of compliant flanges, wherein at least one flange from the plurality of flanges comprises a plurality of elongate trenches along an exterior surface of the at least one flange, wherein the plurality of elongate trenches are configured to compress and conform to a shape of an ear canal and to distribute concentric compressive forces when the retaining seal assembly is inserted in the ear canal,
• wherein the plurality of elongate trenches are configured as a low pass acoustic filter to provide acoustic attenuation at 1000 Hz and above, and acoustic leakage below 250 Hz.

A retaining seal assembly for a canal hearing device, comprising:

• at least one compliant flange comprising at least 6 elongate trenches along an exterior surface of the flange, wherein the flange is configured to conform to a shape of an ear canal and distribute concentric compressive forces when the retaining seal assembly is inserted in the ear canal, wherein the elongate trenches are configured to provide at least 12 dB of acoustic attenuation at a frequency range of 1000-4000 Hz and less than 10 dB of acoustic attenuation at 125 Hz and below;
• and
• a debris barrier configured to provide protection for a sound port of a canal hearing device in-situ.