TY - GEN
T1 - Electronic steering for a microphone array by sub-band phase compensation
AU - Tourbabin, Vladimir
AU - Rafaely, Boaz
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Directional microphones are widely used in spatial filtering applications. The directivity and steering capabilities are usually realized using arrays of sensors connected to a digital processor. In general, these techniques are very complicated and expensive. In this work a continuous-time electronic steering technique for microphone array based on sub-band phase compensation is presented. It can be realized by means of analogue electronics, selecting gain and phase value for each sensor as a function of look direction. First, the spatial performance of the proposed microphone is analyzed at a single frequency. Then, the frequency range of interest is divided into several sub-bands according to the desired frequency resolution, and the weights are designed independently for each sub-band frequency. The paper presents a theoretical formulation of the proposed methods, and a numerical simulation showing that the performance of the proposed microphone is comparable to that of a conventional delay-and-sum beamformer.
AB - Directional microphones are widely used in spatial filtering applications. The directivity and steering capabilities are usually realized using arrays of sensors connected to a digital processor. In general, these techniques are very complicated and expensive. In this work a continuous-time electronic steering technique for microphone array based on sub-band phase compensation is presented. It can be realized by means of analogue electronics, selecting gain and phase value for each sensor as a function of look direction. First, the spatial performance of the proposed microphone is analyzed at a single frequency. Then, the frequency range of interest is divided into several sub-bands according to the desired frequency resolution, and the weights are designed independently for each sub-band frequency. The paper presents a theoretical formulation of the proposed methods, and a numerical simulation showing that the performance of the proposed microphone is comparable to that of a conventional delay-and-sum beamformer.
UR - http://www.scopus.com/inward/record.url?scp=78651227770&partnerID=8YFLogxK
U2 - 10.1109/EEEI.2010.5662150
DO - 10.1109/EEEI.2010.5662150
M3 - Conference contribution
AN - SCOPUS:78651227770
SN - 9781424486809
T3 - 2010 IEEE 26th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2010
SP - 585
EP - 589
BT - 2010 IEEE 26th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2010
T2 - 2010 IEEE 26th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2010
Y2 - 17 November 2010 through 20 November 2010
ER -