29th Biennial IERASG Symposium

David Jackson Morris, Associate Professor, Speech Pathology and Audiology, University of Copenhagen




The Flatirons, slabs of reddish-brown sandstone, in the foothills of the Rocky mountains, were the backdrop for the International Evoked Response Audiometry Study Group (IERASG) meeting 2025.


This biannual event was inaugurated by the historical luminary in the field of late evoked-potential research, Halowell Davis, and continues to draw together researchers, clinicians and industry delegates with a specific interest in basic and clinical research into auditory electrophysiology.

The IERASG 2025 was hosted by Christine Yoshinaga-Itano and her keynote speech walked delegates through the trials and tribulations encountered during the establishment of the first statewide universal neonatal hearing screening program.


This years IERASG included over 50 podium presentations and just as many posters. These delved into topics as diverse as cochlear synapotopathy, hearing screening, vestibular testing and speech perception. A roundtable discussion by research experts highlighted the pressing need for a working definition and index of listening effort. From a scientific perspective, a popular theme this year was the Envelope Following Response.

The recipient of the Halowell Davis memorial prize for 2025 was Professor Robert Burkhardt. Robert ‘Bob’ is a stalwart of the meeting and his questions and comments on papers delivered are astute and encouraging but never averse to bruising in the interest of promoting better science.  In the course of the Hallowell Davis Lecture Bob walked us through his career in both animal and human auditory electrophysiology, featuring never before seen cross-species comparisons of ABR latency-intensity functions.



The Presidency of the IERASG council will pass from Professor Suzanne Purdy (Auckland, New Zealand) to Andy Beynan (the Netherlands). The dedicated guidance and warmth that Professor Purdy has brought to the role over many years has inspired a generation of researchers in presenting their research at this forum, and generally in supporting practice in the field of neural evoked responses.

Andy takes the reigns at a time where we see advances in the field, and coming events will take place in Seoul in 2027 and in Copenhagen in 2029.