Comments: download file (cintal_rep).
Ref.: SiPLAB Report 04/17, SiPLAB, University of Algarve, April 2017.
Abstract
This report discusses acoustic calibration measurements of the Dual Accelerometer Vector
Sensor (DAVS) at the Arsenal tank, in Lisbon. The measurements took place on the 7 th
and 8 th of November 2016 and aimed at the calibration of the device in the frequency range
of 1 kHz to 4 kHz. The calibration was carried out in terms of sensitivity and directivity
in two dimensions for the DAVS hydrophone and two accelerometers. It is shown the
sensitivities of the sensor elements of DAVS (i.e. accelerometers and hydrophone) are
similar the nominal values of the individual elements. Differences may be attributed to
both the experimental set up and the interaction of the elements in the DAVS structure.
The beam pattern of the hydrophone was found onmidirectional within 3.5 dB but the
directivity measurements for the accelerometers were not conclusive. This is attributed
partially to the lack of free-field conditions and partially to the DAVS structure.