DE132146C - - Google Patents
Info
- Publication number
- DE132146C DE132146C DENDAT132146D DE132146DA DE132146C DE 132146 C DE132146 C DE 132146C DE NDAT132146 D DENDAT132146 D DE NDAT132146D DE 132146D A DE132146D A DE 132146DA DE 132146 C DE132146 C DE 132146C
- Authority
- DE
- Germany
- Prior art keywords
- sound
- tube
- axis
- focal point
- paraboloid
- 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.)
- Active
Links
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 claims description 2
- 210000002388 eustachian tube Anatomy 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE132146C true DE132146C (enrdf_load_stackoverflow) |
Family
ID=400425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT132146D Active DE132146C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE132146C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT132146D patent/DE132146C/de active Active
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