A person’s situational awareness is the ability to understand and correctly interpret the world as it exists around them. One component of auditory situational awareness is sound localization, or the ability to identify where a sound is in space relative to the listener. Many headsets designed for military or firearm use contain hear-through technology to safely pass sound from outside the hearing protector to inside the hearing protector. This allows the user to hear (and respond to) the environment around them. This study examines the impact of a phase inversion in one ear of this hear-through circuitry on a person’s localization ability. Testing was conducted in accordance with ASA/ANSI S3.71-2019, Method 3 to measure the impact on response time, using full spectrum stimuli as well as band-limited stimuli to focus testing on each aural cue.

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