Page 335 - Microsensors, MEMS and Smart Devices - Gardner Varadhan and Awadelkarim
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CONCLUDING REMARKS 315
Figure 9.10 Pictorial representation of different waves
From these fundamental properties of waves, it should be noted that for applications
considered here, such as ice-detection, there are a variety of possible options. Because
ice-detection primarily involves sensing the presence of a liquid (e.g. water), it is obvious
that Rayleigh wave modes and flexural plate (S) modes cannot be used because of their
attenuative characteristics. Therefore, it is imperative that only those wave modes are used
whose longitudinal component is small or negligible compared with its surface-parallel
