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Published on: September 7, 2022
Evoked response study tool: a portable, rugged system for single and multiple auditory evoked potential measurements
1US Navy Marine Mammal Program, SSC Pacific, Code 71510, San Diego, California 92152, USA.
The Journal of the Acoustical Society of America
|July 17, 2009
Summary
A new portable system, the Evoked Response Study Tool (EVREST), enables field testing of auditory evoked potentials in stranded cetaceans. This technology is crucial for assessing hearing in odontocetes, including echolocating species.
Area of Science:
- Marine Biology
- Bioacoustics
- Neuroscience
Background:
- Portable auditory evoked potential (AEP) systems are needed for field testing of stranded cetaceans.
- Existing commercial AEP systems lack the necessary bandwidth for odontocete testing and are not field-suitable.
Purpose of the Study:
- To present the Evoked Response Study Tool (EVREST), a novel portable system for calibrating sound stimuli and recording/analyzing AEPs.
- To develop a system suitable for the field assessment of hearing in stranded or rehabilitating cetaceans, particularly odontocetes.
Main Methods:
- Development of a Windows-based hardware/software system (EVREST).
- Design of portable, rugged, and battery-powered hardware with a bandwidth covering the audible range of echolocating odontocetes.
- Implementation of EVREST software with a graphical user interface, real-time data analysis, diverse stimulus options, and automation.
Main Results:
- EVREST successfully calibrates sound stimuli and records/analyzes transient and steady-state AEPs.
- The system's hardware is portable and rugged for field deployment.
- The system's bandwidth is adequate for testing the hearing of echolocating odontocetes.
Conclusions:
- EVREST is a suitable system for field testing the auditory evoked potentials of stranded or rehabilitating cetaceans.
- This tool addresses the limitations of commercial systems for odontocete auditory assessment in field conditions.
