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The acoustic engineering that made draco functional as sound-producing device demonstrated sophisticated understanding of how wind velocity, tube dimensions, and opening shapes affected the sounds produced. The craftsmen who made heads experimented with different mouth opening sizes, internal passages, and exterior shapes to achieve desired howling effect. The variations between different dracos created chorus when multiple standards sounded together, the overlapping howls at different pitches creating wall of sound rather than single note.
The psychological impact of the howling extended beyond mere loudness to specific qualities of the sound. The variable pitch that changed with wind speed prevented habituation—listeners couldn’t tune out sound that was constantly changing. The similarity to actual wolf howls triggered instinctive responses in humans who had evolved recognizing such sounds as danger signals. The persistence of the sound—continuing as long as wind blew rather than being brief cry—maintained psychological pressure without allowing recovery.
The communication function that draco sound could serve included signaling unit location in chaotic battle conditions. The distinctive sound of particular draco allowed separated warriors to locate their unit by listening. The silence that occurred if draco fell could indicate that standard-bearer had been killed, warning others that unit was in trouble. The acoustic dimension added to visual function, creating symbol that operated through multiple sensory channels.
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