This presentation concerns recent technological advances in acoustics, encompassing specifically four areas: electroacoustic transducers, audio signal processing, telecom acoustic signal processing, microphone arrays. After a brief introduction of the research activities of the acoustics and vibration laboratory, emphasis will be placed on signal processing by the use of microphone arrays. Traditionally, microphone arrays are extensively used in beam-forming and estimation of direction of arrival (DOA) in speech enhancement problems. This talk is aimed at two other relatively less addressed problems: noise source identification and sound field visualization. An overview of microphone array technology will be given. The talk covers both farfield arrays and nearfield arrays within a unified framework and present innovative techniques differing from the conventional approaches.