DE244198C - - Google Patents

Info

Publication number
DE244198C
DE244198C DENDAT244198D DE244198DA DE244198C DE 244198 C DE244198 C DE 244198C DE NDAT244198 D DENDAT244198 D DE NDAT244198D DE 244198D A DE244198D A DE 244198DA DE 244198 C DE244198 C DE 244198C
Authority
DE
Germany
Prior art keywords
vibrations
acoustic
telephone
sensitivity
intensity
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
Application number
DENDAT244198D
Other languages
German (de)
English (en)
Publication of DE244198C publication Critical patent/DE244198C/de
Active legal-status Critical Current

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 Mechanical Vibrations Or Ultrasonic Waves (AREA)
DENDAT244198D Active DE244198C (cg-RX-API-DMAC10.html)

Publications (1)

Publication Number Publication Date
DE244198C true DE244198C (cg-RX-API-DMAC10.html)

Family

ID=503257

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT244198D Active DE244198C (cg-RX-API-DMAC10.html)

Country Status (1)

Country Link
DE (1) DE244198C (cg-RX-API-DMAC10.html)

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