发明名称 |
APPARATUS AND METHOD FOR A NONINVASIVE ESTIMATE OF THE CHARACTERISTICS OF A PERIODIC/CYCLIC BODILY SOUND IN A REGION CLOSE TO ITS SOURCE |
摘要 |
Methods and apparatus for noninvasively determining a sound pressure of a source that transmits a generally periodic acoustic signal including at least one signal component to a surface of a body are provided. The signal component at the surface of the body is received and an initial phase -inverted signal component is estimated responsive to the received signal component (300-310). The phase -inverted signal component, advanced by a predetermined time increment, is transmitted toward the source via the surface. The predetermined time increment corresponds to a distance of the signal component within the body. At least one feature of the transmitted signal component is adjusted until a further received signal approximates a minimum value. The adjusted signal component corresponds to the signal component at the distance. The apparatus determines the phase -inverted signal component that corresponds to the signal component being proximate to the source (312-332). |
申请公布号 |
WO2007054798(A3) |
申请公布日期 |
2007.10.04 |
申请号 |
WO2006IB03167 |
申请日期 |
2006.11.09 |
申请人 |
BRENDAN INVESTMENTS LTD. BVI;PERETTO, LORENZO;LONGHINI, LUCA |
发明人 |
PERETTO, LORENZO;LONGHINI, LUCA |
分类号 |
A61B7/00;A61B8/00 |
主分类号 |
A61B7/00 |
代理机构 |
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代理人 |
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地址 |
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