[MARMAM] Release of ANSI standard - Procedure for Determining Audiograms in Toothed Whales through Evoked Potential Methods

Dorian Houser dorian.houser at nmmpfoundation.org
Sun Aug 12 16:11:05 PDT 2018

To the MARMAM community -

This post announces that in June 2018 the American National Standards
Institute (ANSI) published an ANSI standard entitled, "Procedure for
Determining Audiograms in Toothed Whales through Evoked Potential Methods
(ANSI/ASA S3/SC1.6-2018)." The new ANSI standard describes procedures for
measuring auditory evoked potential (AEP) audiograms in odontocete
cetaceans and provide recommendations in the areas of:
• General equipment requirements
• Stimulus waveforms for measuring hearing thresholds
• Acoustic stimulus waveform calibration
• Threshold estimation methods
• Results reporting formats
• Modulation rate transfer function determination
• Background noise considerations
• Testing arrangements, including types of electrodes and their placement.

There are numerous variations in AEP methods used to test toothed whale
hearing that result in variable threshold measurements across species (and
even within the same individual). The purpose of ANSI/ASA S3/SC1.6-2018 is
to standardize methods such that the results of AEP hearing tests are
comparable across laboratories and researchers. Ultimately, this should
facilitate the incorporation of AEP hearing data into environmental
stewardship efforts related to ocean noise issues.

The standard can be obtained from the Acoustical Society of America
Standards Store (https://acousticalsociety.org/standards/). As a reminder
for those of you that are members of the Acoustical Society of America, you
are entitled to five free standards downloads per year.

Dorian Houser

Dorian S. Houser, Ph.D.
Director of Biologic and Bioacoustic Research
Interim Director of Environmental Stewardship
National Marine Mammal Foundation
877-360-5527 ext.112
dorian.houser at nmmfoundation.org
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