TY - BOOK AU - Hornung, Mark R AU - Brand, Oliver TI - Micromachined ultrasound-based proximity sensors SN - 9780792385080 SN - 99020175 U1 - 681.25 HOR PY - 1999/// CY - Boston PB - Kluwer Academic KW - Microelectromechanical systems KW - Proximity detectors KW - Ultrasonic transducers N1 - Includes bibliographical references (p. [111]-118) and index ER -