Interference resistant biomedical transducer
US4784154A · kind A · utility
44Cited by
14References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1986 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Nov 13, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B7/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An interference resistant biomedical transducer for monitoring the acoustic output of a patient's cardiac or respiratory system which provides a high degree of rejection of acoustic noise and spurious electromagnetic signals. The transducer comprises a piezoelectric diaphragm assembly having electrodes which produce a differential output signal. The transducer housing includes a massive metal disc and a compliant handle which provide a mechanical filter to remove undesired signals such as those related to motion of the patient and ambient acoustic noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.