Current Projects

Chi Tran — Evaluation of Important Factors in Electroacoustic Verification of Wireless Technology — 2020
Download the poster (pdf)

Electroacoustic verification of wireless technology systems has an important role in the effectiveness and consistency of auditory rehabilitation. Factors that can affect electroacoustic analysis with wireless digital modulation (DM) systems include directional features of the transmitter and settings on the DM receiver. Despite control for these, variability was noted across 18 DM receivers when tested with the same transmitter and hearing aid. The results suggest the need for regular electroacoustic verification of wireless technology systems.

Chi Tran


Rebekah Havens — Electroacoustic Verification of Hearing Aids with Smartphone Connectivity — 2020
Download the poster (pdf)

The purpose of this project was to obtain electroacoustic verification of Made for iPhone hearing aids (HA) which function with an iPhone as a remote microphone (RM) in an effort to develop an evaluation protocol. While ANSI S3.47 provides instructions for the electroacoustic evaluation of assistive devices, there are no protocols for the evaluation of HAs that connect with smartphones used as a RM. Results suggested that electroacoustic results may not be maintained when aid is connected to a smartphone.

Rebekah Havens


Rebekah Havens — Features of MFi and MFA Hearing Aids — 2019
Download the poster (pdf)

With the popularity of smartphones, many persons are interested in their connectivity with hearing aids. The first aids directly connected to iPhones and were referred to as MFi (Made for iPhone) aids. The purpose of this project was to compare features across hearing instruments with wireless connectivity to smartphones. The features of interest include smartphone compatibility, rechargeable batteries, telecoil, style of aid, and other capabilities such as health data tracking. Information was collected by first consulting websites and then getting clarification from manufacturers so that comparisons could be made of these common desirable features.

Rebekah Havens


David McCullough, Emma Freeman — Testing Hearing Thresholds using Smartphone-Based App — 2019
Download the poster (pdf)

The purpose of this study is to consistently achieve thresholds from a smartphone application that are in line with a GSI-61 audiometer calibrated for clinical environments. While the GSI-61 meets industry-grade certification independent applications are subject to the standards of developers. Thresholds from persons with normal hearing indicated a lack of agreement with the clinical protocol which led to adjustments to the algorithm. A second version of the app is currently being tested since results from the first version revealed a need for improvement.

David McCullough, Emma Freeman


Audrey Harris — Use of the Assistive Technology Validation Protocol to Demonstrate the Benefits of Wireless Technology — 2018
Download the poster (pdf)

It is common that communication challenges experienced by persons with hearing loss often result in the need for technology beyond the personal hearing aid. Noisy environments lead to reduced speech recognition in both individuals with hearing loss and with normal hearing. The purpose of the study was to examine a protocol developed to validate the benefit of using assistive listening devices to enhance speech recognition in noise.

Audrey Harris