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. 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.
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申请公布号 |
US2007106180(A1) |
申请公布日期 |
2007.05.10 |
申请号 |
US20060595451 |
申请日期 |
2006.11.09 |
申请人 |
PERETTO LORENZO;LONGHINI LUCA |
发明人 |
PERETTO LORENZO;LONGHINI LUCA |
分类号 |
A61B7/00 |
主分类号 |
A61B7/00 |
代理机构 |
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