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Test-bench characterization results (A): Adding foam on top of the sensor affects the response of the sensor significantly, since the load is more evenly distributed on the plate. No strong frequency-dependency of the response is observed. (a) Effects of adding foam on top of the sensor to improve uniformity of applied loads. Three loads (1 kg, 2 kg and 3 kg) are placed onto the sensor. (b) Effects of adjusting the frequency of the load.
