Abstract: A broadband ultrasonic transducer device (UTD) is disclosed that utilizes a plurality of narrow-band piezo electric elements grouped into single-frequency sub-arrays to provide a relatively simple, highly-reliable deterrent unit (DU) capable of emitting ultrasonic energy over a wide coverage area and at a sound pressure level that meets or exceeds other DU approaches. In an embodiment, the broadband UTD includes a housing portion configured to couple to a plurality of piezo sub-array plates. Each piezo sub-array plate includes a plurality of pockets or cavities to receive respective narrow-band (e.g., 1-3 kHz) piezo electro transducer elements with characteristics, e.g., geometries and material composition, that cause each to emit ultrasonic energy at a particular resonant frequency. A controller of the UTD implements a control scheme to emit ultrasonic energy in a plurality of output modes including a white noise node and a single-frequency mode for deterrence applications.

Abstract: A system and method for providing effective acoustic impedance matching for a broadband ultrasonic transducer device (UTD) by adding at least one impedance matching plate (IMP) and a shim to the UTD. The IMP is a flat plate with a grid of holes and the shim is disposed between the IMP and the ultrasonic transducer, e.g. piezoelectric transducer, of the UTD.

Abstract: A broadband ultrasonic transducer device (UTD) is disclosed that utilizes a plurality of narrow-band piezo electric elements grouped into single-frequency sub-arrays to provide a relatively simple, highly-reliable deterrent unit (DU) capable of emitting ultrasonic energy over a wide coverage area and at a sound pressure level that meets or exceeds other DU approaches. In an embodiment, the broadband UTD includes a housing portion configured to couple to a plurality of piezo sub-array plates. Each piezo sub-array plate includes a plurality of pockets or cavities to receive respective narrow-band (e.g., 1-3 kHz) piezo electro transducer elements with characteristics, e.g., geometries and material composition, that cause each to emit ultrasonic energy at a particular resonant frequency. A controller of the UTD implements a control scheme to emit ultrasonic energy in a plurality of output modes including a white noise node and a single-frequency mode for deterrence applications.

Abstract: Generally, a wind data acquisition system configured to perform wind resource assessments. A system consistent with the present disclosure may provide a cost-effective data acquisition and analysis system useful for performing wind resource assessments. The system may be configured to automatically detect heights and bearings of instrument mounting booms associated with a wind tower. The system may further be configured to improve the accuracy of differential temperature measurements of a wind tower by providing automatic calibration of components used to measure differential temperature.