Apparatus and method for a noninvasive estimate of the characteristics of a periodic/cyclic bodily sound in a region close to its source
US8574163B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2006 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Jul 10, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0204
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.