Measuring the direction of sound arrival with a very small array of sensors
What is it about?
The paper shows the mathematical details of how to measure the angle of arrival of a plane wave using a general shaped 3-dimensional array, as well as simplifications when using a tetrahedral array (or equilateral triangle array in 2 dimensions). The paper shows how this is possible only for cases where the sound from the direction of interest has high signal-to-noise ratio.
Why is it important?
There are many applications where a large array of sensor traditionally used for beam forming direction finding is not practical. Good examples of this are robotics sensors and mobile surround sound audio microphones.
The following have contributed to this page: David Swanson