The acoustic silhouette occurred depending on your position relative to the source of the sound, eg. cannon fire and rifle shot.
One could be relatively close to the source of the sound and never hear it because of the way sound waves travel and where one was standing, or hiding.
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The acoustic silhouette occurred depending on your position relative to the source of the sound, eg. cannon fire and rifle shot.
One could be relatively close to the source of the sound and never hear it because of the way sound waves travel and where one was standing, or hiding.