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Effectiveness Comparison of 3D-Printed and Conventional Ear Tip Comfort in Individuals With Hearing in the Normal Range

Who can join

Ages 18 to 89 · All sexes · Healthy volunteers welcome

Inclusion Criteria:

* Normal hearing thresholds (\<25 dB HL) at octave frequencies from 250-8000Hz.
* Normal otoscopy: patent ear canals with normal appearing eardrums and aerated middle ear, bilaterally.
* English speaking.

Exclusion Criteria:

* history of extensive or current outer or middle ear pathology.
* history of extensive outer or middle ear surgery.
* history of neurological or cognitive disorder.

About the study

Access to affordable and timely hearing healthcare remains a major challenge for many individuals, partly due to the high cost and long turnaround time. This study will explore whether 3D-printed ear tips perform as well as or better than standard ear tips in terms of sound quality, comfort, and fit. It will also compare how long each method takes to make and how much each costs.

What is being tested

• BTE hearing aid with compatible earmolds (device)

Sponsor: University of Arizona · Participants: 30 · Started: Nov 7, 2025

Contact the study team

• Bryan Wong, AuD, PhD · Phone: 520-626-8549

Official record on ClinicalTrials.gov — NCT07216937

Locations in the U.S.

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.