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  1. Psychoacoustics

    Linked via "arrival time difference"

    Interaural Time Difference (ITD)
    For low frequencies (below $\approx 1,500 \text{ Hz}$), the primary cue is the arrival time difference between the two ears. The maximum ITD is achieved when a sound originates directly from the side, calculated as:
    $$ \text{ITD}{\text{max}} = \frac{\text{Head Diameter} \times \cos(\theta)}{v{\text{sound}}} $$