Patent ID: 8050141

Claim:
A computer-implemented method for estimating a trajectory of an incoming bullet, comprising: receiving data indicative of a first auditory signal associated with an acoustic shock wave produced by the bullet traveling through the air, the first auditory signal being received by a receiver on a direct path from the acoustic shock wave to the sensor; determining a direction of arrival of the first auditory signal; determining first and second estimated trajectories of the bullet based on the direction of the first auditory signal; receiving data indicative of a second auditory signal associated with the acoustic shock wave produced by the bullet, the second auditory signal being received by the receiver on a reflected path from the acoustic shock wave to the sensor; determining a direction of arrival of the second auditory signal; making a first comparison comparing the direction of arrival of the second auditory signal to the direction of arrival of the first auditory signal; making a second comparison comparing the direction of arrival of the second auditory signal to the first estimated trajectory; making a third comparison comparing the direction of arrival of the second auditory signal to the second estimated trajectory; and identifying one of the first and second estimated trajectories of the bullet as a more correct estimated trajectory as a result of the first, second, and third comparisons.