COMPUTER HARDWARE
INPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How is touch detected in an Surface Acoustic Wave touchscreen?
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When touched by a finger, there is a change in the electric field at that position
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When touched by a finger, the infra-red beam is interrupted
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Two sound wave transducers detect a reduction in the sound wave amplitude
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When pressed by a finger, the two conducting layers make contact and complete a circuit
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Explanation:
Detailed explanation-1: -Piezoelectric acoustic wave sensors apply an oscillating electric field to create a mechanical wave, which propagates through the substrate and is then converted back to an electric field for measurement.
Detailed explanation-2: -Surface acoustic wave (SAW) touchscreens are on the rise. You can find them in restaurants, retail stores, amusement parks, banks and more.
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