found: Work cat.: Collings, S.W. Acoustic beamforming in wireless sensor nodes, 2008:intro. (Beamforming a signal processing technique whereby the directionality of an arrayof transducers, either transmitting or receiving, may be controlled electronically)
found: Wikipedia, viewed Nov. 22, 2008(Beamforming is a signal processing technique used in sensor arrays for directional signal transmission or reception. This spatial selectivity is achieved by using adaptive or fixed receive/transmit beampattern. The improvement ompared with an omnidirectional reception/transmission is known as the receive/transmit gain (or loss). Beamforming can be used for both radio or sound waves)
found: Laplante, P.A. Electrical engineering dictionary, 2000, viewed online Nov. 22, 2008(beamforming a form of filtering in spatial rather than time domain to obtain a desired spatial impulse response in order to suppress or to reject signal components coming from certain directions. The technique involves directing one or more beams in certain directions by adjusting, for example, the element excitation of an array antenna. Used in communications applications to suppress other signals than the desired source signal. Also termed spatial filtering)
