摘要:
An optical microphone arrangement comprises: an array of optical microphones (4) on a substrate (8), each of said optical microphones (4) providing a signal indicative of displacement of a respective membrane (24) as a result of an incoming audible sound; at first processor (12) arranged to receive said signals from said optical microphones (4) and to perform a first processing step on said signals to produce a first output; and a second processor (14) arranged to receive at least one of said signals or said first output; wherein at least said second processor (14) determines presence of at least one element of human speech from said audible sound.
摘要:
Bei einem Verfahren zur Bestimmung der Tiefe von getauchten Schallquellen unter Verwendung einer unter Wasser geschleppten akustischen Antenne zur Schallquellenortung, die eine Vielzahl von beabstandet aufgereihten Hydrophonen aufweist, wird aus den elektrischen Ausgangssignalen der Hydrophone mittels Beamforming eine Richtcharakteristik der Antenne mit einer Hauptkeule maximaler Empfangsempfindlichkeit (Beam 25) gebildet, der Beam (25) in Vertikalrichtung geschwenkt und die Intensität des Beamformer-Ausgangssignal in Zuordnung zur jeweiligen Beamschwenklage gemessen. Aus der dem Intensitätsmaximum zugehörigen Schwenklage des Beams (25), der Tauchtiefe der akustischen Antenne (10) und der Entfernung zur Schallquelle wird die Tauchtiefe der Schallquelle errechnet.
摘要:
The present invention is a system and technique for reducing the effective beam width of a receive beam for a sensing system, for example a sonar or radar system. The sensing system includes a plurality of physical sensors (26) each for measuring a receive signal wherein each receive signal includes a first and second data processing unit. The sensing system (10) may include means for computing sensor data (12) for at least one extrapolated-sensor, including first extrapolation means for computing a first extrapolated-sensor data unit of the at least one extrapolated-sensor by extrapolation of a first data processing unit of the plurality of physical sensors, and second extrapolation means for computing a second extrapolated-sensor data unit of the at least one extrapolated-sensor by extrapolation of a second data processing unit of the plurality of physical sensors. The system may also include means (12) for combining the first and second extrapolated-sensor data units of the at least one extrapolated sensor to the first and second data processing units of the plurality of physical sensors to thereby generate a narrower effective beam width of a receive beam.