Dag Stranneby

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This study compared three different signal-processing principles (eight basic algorithms)-transposing, modulating, and filtering-to find the principle(s)/algorithm(s) that resulted in the best tactile identification of environmental sounds. The subjects were 19 volunteers (9 female/10 male) who were between 18 and 50 years old and profoundly hearing(More)
The goal of the present study was to compare six transposing signal-processing algorithms based on different principles (Fourier-based and modulation based), and to choose the algorithm that best enables identification of environmental sounds, i.e. improves the ability to monitor events in the surroundings. Ten children (12-15 years) and 10 adults (21-33(More)
Morse code has been used as a communications system at a distance to transmit text through tone or light pulses. This comparative study aims to test and evaluate the vibrotactile identification of Morse coded signals communicating instructions for movement. The pulses were presented on abdomen and wrist among 14 males (40-85 yr) experienced in acoustic(More)
Today’s electronic products and subassemblies are highly integrated, miniaturized devices having complex functionality. Final test and troubleshooting using conventional test points, probes and bed-of-nails techniques are becoming harder, and are in many cases not even possible. Further, due to increasing production volumes, the time needed for testing is a(More)
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