GB148988A - - Google Patents

Info

Publication number
GB148988A
GB148988A GB20850/20A GB2085020A GB148988A GB 148988 A GB148988 A GB 148988A GB 20850/20 A GB20850/20 A GB 20850/20A GB 2085020 A GB2085020 A GB 2085020A GB 148988 A GB148988 A GB 148988A
Authority
GB
United Kingdom
Prior art keywords
microphone
tuned
diaphragm
aperiodic
carry
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
Application number
GB20850/20A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Signal GmbH
Original Assignee
Signal GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Signal GmbH filed Critical Signal GmbH
Publication of GB148988A publication Critical patent/GB148988A/en
Expired 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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB20850/20A 1917-05-19 1920-07-10 Expired GB148988A (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE148988X 1917-05-19

Publications (1)

Publication Number Publication Date
GB148988A true GB148988A (https=) 1921-09-22

Family

ID=31954683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20850/20A Expired GB148988A (https=) 1917-05-19 1920-07-10

Country Status (1)

Country Link
GB (1) GB148988A (https=)

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