DE293792C - - Google Patents
Info
- Publication number
- DE293792C DE293792C DENDAT293792D DE293792DA DE293792C DE 293792 C DE293792 C DE 293792C DE NDAT293792 D DENDAT293792 D DE NDAT293792D DE 293792D A DE293792D A DE 293792DA DE 293792 C DE293792 C DE 293792C
- Authority
- DE
- Germany
- Prior art keywords
- ship
- sound
- resonator
- microphone
- membrane
- 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
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)
- Piezo-Electric Transducers For Audible Bands (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE293792C true DE293792C (enrdf_load_stackoverflow) |
Family
ID=548425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT293792D Active DE293792C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE293792C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT293792D patent/DE293792C/de active Active
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