  Acoustic beamforming with a microphone array represents an adequate
technology for remote acoustic surveillance, as the system has no mechanical
parts and it has moderate size. However, in order to accomplish real
implementation, several challenges need to be addressed, such as array
geometry, microphone characteristics, and the digital beamforming algorithms.
This paper presents a simulated analysis on the effect of the array geometry in
the beamforming response. Two geometries are considered, namely, the linear and
the circular geometry. The analysis is performed with computer simulations to
mimic reality. The future steps comprise the construction of the physical
microphone array, and the software implementation on a multichannel digital
signal processing (DSP) system.
