DE367935C - Device for the interference-free recording of underwater sound signals - Google Patents
Device for the interference-free recording of underwater sound signalsInfo
- Publication number
- DE367935C DE367935C DES57853D DES0057853D DE367935C DE 367935 C DE367935 C DE 367935C DE S57853 D DES57853 D DE S57853D DE S0057853 D DES0057853 D DE S0057853D DE 367935 C DE367935 C DE 367935C
- Authority
- DE
- Germany
- Prior art keywords
- recording
- sound signals
- underwater sound
- interference
- free recording
- 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
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 Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
Vorrichtung zur störungsfreien Aufnahme von Unterwasserschallsignalen. Bei der Aufnahme von Unterwasserschallsignalen mischen sich Erschütterungen und Geräusche aus dem Schiffskörper selbst mit den durch das Wasser ankommenden Signalschwingungen und stören die Verständigung. Dieser Übelstand soll durch die Erfindung nach Möglichkeit beseitigt werden.Device for the interference-free recording of underwater sound signals. When recording underwater sound signals, vibrations and Noises from the hull itself with the signal vibrations arriving through the water and disrupt communication. This drawback is to be addressed by the invention as far as possible be eliminated.
Erfindungsgemäß werden zwei Aufnahmeapparate verschiedenartig aufgestellt, so daß der eine von den Signalschwingungen und von den aus dem Schiffskörper stammenden Störungsschwingungen in anderem Verhältnis getroffen wird als der zweite Aufnahmeapparat. Die elektrischen Teile der Aufnahmeapparate werden dann so gegeneinandergeschaltet, daß die Störungsschwingungen sich im Abhörapparat aufheben.According to the invention, two recording devices are set up in different ways, so that one of the signal vibrations and those coming from the hull Disturbance vibrations is hit in a different ratio than the second recording apparatus. The electrical parts of the recording apparatus are then switched against each other in such a way that that the interfering vibrations cancel each other out in the eavesdropping device.
Ein Ausführungsbeispiel ist in Abb. i dargestellt. Der Aufnahmeapparat i, dessen wesentliche Teile eine Membran und ein Mikrophon bilden, ist unmittelbar in der Schiffshaut 3 befestigt. Der zweite Aufnahmeapparat 2 dagegen ist von der Schiffshaut durch eine schalldämpfende Zwischenlage 4 getrennt. Die von den Aufnahmeapparaten kommenden elektrischen Leitungen 5 und 6 sind so geschaltet, daß die erzeugten Wechselströme gegeneinander wirken. Durch die Regelung eines Nebenschlußwiderstandes 7 wird nun die Wirkung des Aufnahmeapparates i so eingestellt, daß die Störungsschwingungen aus i und 2 sich gegenseitig aufheben. Die Signalschwingungen werden sich dann nicht aufheben, da ihre Intensitäten in den Aufnahmeapparaten i und 2 in einem anderen Verhältnis stehen als die Störungsschwingungen. Im Hörer 8 werden also nur die Wirkungen der Signalschwingungen hörbar.An exemplary embodiment is shown in Fig. I. The recording apparatus i, the essential parts of which form a membrane and a microphone, is immediate attached in the ship's skin 3. The second recording apparatus 2, however, is of the The ship's skin is separated by a sound-absorbing intermediate layer 4. The ones from the recording machines coming electrical lines 5 and 6 are connected so that the generated alternating currents act against each other. By regulating a shunt resistor 7 is now the action of the recording apparatus i adjusted so that the disturbance oscillations i and 2 cancel each other out. The signal oscillations will not then cancel as their intensities in the recording apparatus i and 2 in another Relation stand as the disturbance oscillations. So only the effects appear in the listener 8 the signal oscillations are audible.
Bei dem Ausführungsbeispiel nach Abb. 2 ist die Verschiedenheit der Intensitäten auf andere Weise erzielt. Der eine Aufnahmeapparat ii ist unmittelbar in der Schiffswand 13 angebracht, während der zweite Aufnahmeapparat 12 im Brennpunkt eines parabolischen Reflektors 14 liegt. Dieser wirft alle ankommenden Schallwellen in der Richtung auf den Empfänger 12, so daß dieser von wesentlich mehr Signalwellen getroffen wird als der Empfänger ii. Die beabsichtigte Wirkung tritt also selbst dann ein, wenn der Empfangsapparat 12 von ebensoviel Störungsschwingun--en getroffen wird wie der Empfangsapparat ir. Die Schaltung der elektrischen Teile ist dieselbe wie in Abb. _.In the embodiment according to Fig. 2, the difference in intensities is achieved in a different way. One of the receiving apparatus ii is mounted directly in the ship's wall 13 , while the second receiving apparatus 12 is at the focal point of a parabolic reflector 14. This throws all incoming sound waves in the direction of the receiver 12, so that it is hit by significantly more signal waves than the receiver ii. The intended effect occurs even if the receiving apparatus 12 is hit by as many perturbation oscillations as the receiving apparatus ir. The circuit of the electrical parts is the same as in Fig. _.
Die beiden Aufnahmeapparate werden am besten so nahe zueinander angeordnet, daß keine beträchtlichen Phasenverschiebungen zwischen den von ihnen weitergegebenen Signalwellen auftreten. In einzelnen Fällen läßt sich eine solche Phasenverschiebung auch durch besondere Mittel beseitigen.The two recording devices are best placed so close to each other that that no significant phase shifts between those passed by them Signal waves occur. Such a phase shift can be found in individual cases eliminate also by special means.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES57853D DE367935C (en) | Device for the interference-free recording of underwater sound signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES57853D DE367935C (en) | Device for the interference-free recording of underwater sound signals |
Publications (1)
Publication Number | Publication Date |
---|---|
DE367935C true DE367935C (en) | 1923-01-29 |
Family
ID=7492123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES57853D Expired DE367935C (en) | Device for the interference-free recording of underwater sound signals |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE367935C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2425594A (en) * | 1943-03-04 | 1947-08-12 | Western Electric Co | Submarine signal microphone |
US2507121A (en) * | 1946-06-27 | 1950-05-09 | Bell Telephone Labor Inc | Exploration of troposphere stratification |
-
0
- DE DES57853D patent/DE367935C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2425594A (en) * | 1943-03-04 | 1947-08-12 | Western Electric Co | Submarine signal microphone |
US2507121A (en) * | 1946-06-27 | 1950-05-09 | Bell Telephone Labor Inc | Exploration of troposphere stratification |
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