JPS5496302A - Acoustic wave transmission system and nonlinear cable transmitter - Google Patents

Acoustic wave transmission system and nonlinear cable transmitter

Info

Publication number
JPS5496302A
JPS5496302A JP15883177A JP15883177A JPS5496302A JP S5496302 A JPS5496302 A JP S5496302A JP 15883177 A JP15883177 A JP 15883177A JP 15883177 A JP15883177 A JP 15883177A JP S5496302 A JPS5496302 A JP S5496302A
Authority
JP
Japan
Prior art keywords
low frequency
acoustic wave
amplitude
high frequency
cable transmitter
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.)
Pending
Application number
JP15883177A
Other languages
Japanese (ja)
Inventor
Haiyoshi Takasaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15883177A priority Critical patent/JPS5496302A/en
Publication of JPS5496302A publication Critical patent/JPS5496302A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To secure a high-efficiency selection of the low frequency to be used for the system of the underwater acoustic wave transmission, by applying the electric signal amplitude-modulated via the low frequency desired for wave transmission from the high frequency to the nonlinear cable transmitter. CONSTITUTION:High frequency H and (a) of a fixed amplitude undergo amplitude modulation M via low frequency acoustic wave L and (b). As a result, the amplitude-modulated voltage waveform (c) emerges at the terminal of cable transmitter T, and at the same time the current of the similar waveform flows to T. Thus, a large amount of vibration amplitude is obtained to the driving force of positive direction of T, and the opposite nonlinearity is obtained in the negative direction. In this case, acoustic wave (d) is transmitted with its average value (1-dot broken line) featuring nearly the same waveform as original low frequency (b). The high frequency component of this transmitted wave (d) shows a large amount of attenuation during the underwaver propagation. On the other hand, the low frequency component features a small amount of attenuation and reaches a remote distance. In this way, the acoustic wave of an extremely low frequency can be transmitted via the miniature cable transmitter which resonates to the high frequency.
JP15883177A 1977-12-27 1977-12-27 Acoustic wave transmission system and nonlinear cable transmitter Pending JPS5496302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15883177A JPS5496302A (en) 1977-12-27 1977-12-27 Acoustic wave transmission system and nonlinear cable transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15883177A JPS5496302A (en) 1977-12-27 1977-12-27 Acoustic wave transmission system and nonlinear cable transmitter

Publications (1)

Publication Number Publication Date
JPS5496302A true JPS5496302A (en) 1979-07-30

Family

ID=15680335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15883177A Pending JPS5496302A (en) 1977-12-27 1977-12-27 Acoustic wave transmission system and nonlinear cable transmitter

Country Status (1)

Country Link
JP (1) JPS5496302A (en)

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