GB1373840A - Microphone for simultaneously monitoring heart pulse and heart noise - Google Patents
Microphone for simultaneously monitoring heart pulse and heart noiseInfo
- Publication number
- GB1373840A GB1373840A GB6018672A GB6018672A GB1373840A GB 1373840 A GB1373840 A GB 1373840A GB 6018672 A GB6018672 A GB 6018672A GB 6018672 A GB6018672 A GB 6018672A GB 1373840 A GB1373840 A GB 1373840A
- Authority
- GB
- United Kingdom
- Prior art keywords
- housing
- heart
- apertures
- microphone
- cavities
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000012544 monitoring process Methods 0.000 title abstract 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 1
- 239000013013 elastic material Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/332—Portable devices specially adapted therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/04—Structural association of microphone with electric circuitry therefor
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- Signal Processing (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Acoustics & Sound (AREA)
- Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
1373840 Stethoscopic microphone SIEMENS AG 29 Dec 1972 [29 Dec 1971] 60186/72 Heading H4J A microphone, particularly for monitoring heart pulse and heart noise, comprises a housing 5, 7, in which a piezoelectric element 1 is mounted, the element being carried on a support 3 which divides the housing into two cavities. Apertures 11 are provided through the housing wall to permit communication between an elastic medium, e.g. air, filling one of the cavities with the same elastic medium outside the housing. The second cavity is also filled with an elastic medium. The cavity volumes and the apertures are so dimensioned as to damp the crystal and enhance the response to heart pulse and heart noise. As described the piezo electric element 1 is encapsulated in the elastic material of the support 3, and a circuit plate 17 with apertures 19 is mounted in one of the cavities while an apertured plate 25 is mounted between the support 3 and the housing apertures 11 to obstruct the direct path and protect the element from damage. An electrocardiograph electrode 23 is provided on the face of the housing and the housing and connecting lead 21 are screened. The transducer 41, Fig. 2, is connected in series with a capacitor 42 to form a capacitive divider so that the fundamental of the heart pulse is emphasized in the signal fed out via the impedance transformer 35 while the transducer is connected in a differentiating circuit with resistor 46 to emphasize the heart noise component which is applied to the output via a high pass filter comprising capacitor 43 and resistor 45.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE16811/71A SE367300B (en) | 1971-12-29 | 1971-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1373840A true GB1373840A (en) | 1974-11-13 |
Family
ID=20302803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6018672A Expired GB1373840A (en) | 1971-12-29 | 1972-12-29 | Microphone for simultaneously monitoring heart pulse and heart noise |
Country Status (4)
| Country | Link |
|---|---|
| FR (1) | FR2165963B1 (en) |
| GB (1) | GB1373840A (en) |
| IT (1) | IT979669B (en) |
| SE (1) | SE367300B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336367B1 (en) | 1998-01-29 | 2002-01-08 | B-Band Oy | Vibration transducer unit |
-
1971
- 1971-12-29 SE SE16811/71A patent/SE367300B/xx unknown
-
1972
- 1972-12-19 FR FR7245200A patent/FR2165963B1/fr not_active Expired
- 1972-12-22 IT IT33406/72A patent/IT979669B/en active
- 1972-12-29 GB GB6018672A patent/GB1373840A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336367B1 (en) | 1998-01-29 | 2002-01-08 | B-Band Oy | Vibration transducer unit |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2165963A1 (en) | 1973-08-10 |
| IT979669B (en) | 1974-09-30 |
| DE2259496A1 (en) | 1973-07-12 |
| SE367300B (en) | 1974-05-20 |
| FR2165963B1 (en) | 1978-03-03 |
| DE2259496B2 (en) | 1975-10-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |