Verifying Open-Ear Fittings With Speech-Mapping. AAA CEU Theater Program. David J. Smriga, M.A. Audiologist Hearing Industry Consultant. Strom, Karl, “Rapid Product Changes Mark The New Mature Digital Market” Hearing Review Vol. 13, No. 5, 2006 p.p.70-75. BTE Growth Spurt.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Verifying Open-Ear Fittings With Speech-Mapping
AAA CEU Theater Program
David J. Smriga, M.A.
Hearing Industry Consultant
Strom, Karl, “Rapid Product Changes Mark The New Mature Digital Market” Hearing Review
Vol. 13, No. 5, 2006 p.p.70-75
Lybarger S. Earmolds. In: Katz J, ed. Handbook of Clinical Audiology, 3rd edition. Baltimore: Williams and Wilkins; 1985: 885-910.
Objective Verification of Open Fittings
Probe Microphone Assemblies
it doesn’t matter
which I use!
Sounds get louder as you go UP the scale
Maximum output targets
dB SPL Eardrum reference
Threshold (dB SPL TM)
Pink banana = REAR with aid OFF
Green banana = REAR with aid ON
Can Directional Microphones Work In An Open Fit Environment?
H. Dillon; NAL, CRC for CI and HAI
Measuring Directional Microphones Using Polar Plots
Conventional Directional Microphone Test
(Polar Plot Measurement)
Sound Field Speaker
Pure Tone Frequency
Obtaining a Directional Microphone Frequency Response in the Presence of Multiple Input Source Locations
A New Way of Measuring Directional Microphone Performance
Verifit Testing System Hardware
= Secondary input signal (512 pure tones 7.8 Hz apart)
= Main input signal (512 pure tones 7.8Hz apart)
Concept Behind Directional Box Test
Clinical Verification of Directional Performance
B) Verifit REM Directional Verification
Hearing Instrument Test
In REM Directional
Rear Facing Auxiliary Speaker
REAR to Front Signal
REAR to Back Signal
Fabry, D., “Facts vs. Myths: The ‘Skinny’ On Slim-Tube Open Fittings” Hearing Review, May, 2006