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  • Spy On The Octopi: Students build submarine to track Giant Pacific Octopus
    a video camera and hydrophones to track its prey. Undergrads at Colorado School of Mines are developing the hydrophones that will create biaural hearing. This will let researchers determine the direction from which a sound originates. Shadow III completed 10 dives in Prince William Sound
  • Lanthanum Modified PZT (PLZT)
    coercivity, higher coupling factors and reduced aging. Lanthanum modified lead zirconate titanate materials are applied in high sensitivity applications such as hydrophones, sounders and loudspeakers.
  • Lead Magnesium Niobate (PMN)
    (quadratically). These materials are used for hydrophones, actuators, receivers, projectors, sonar transducers and in micro-positioning devices. PMN forms solid solution alloys (PMN-PT) with lead titanate.
  • Barium Titanate (BT)
    useful for hydrophones and other receiving devices such as low-power projectors for fish-finder products.
  • Acoustic / Ultrasonic Transducers
    options, beam patterns, and power levels. Underwater acoustic transducers can contain both transmitters and receivers, or they can be solely transmitters used in conjunction with a hydrophone. They sense reflected sound and use distance and directional data for communication, mapping and navigation
  • Lead Zirconate Titanate (PZT)
    and raise the resistivity. These additives also enhance domain reorientation resulting in square hysteresis loops, low coercivity, higher coupling factors and reduced aging. Applied in high sensitivity applications such as hydrophones, sounders and loudspeakers.
  • PZN Ceramics
    PZN ceramics have high coefficients of electrostrictive and dielectric constants. They are used in the production of hydrophones, actuators, receivers, projectors, sonar transducers, integrated layered capacitors, and micro-positioning devices. PZN is an abbreviation for Pb(Zn1/3 Nb2/3)O3
  • Guidelines for Specifying Underwater Electroacoustic Transducers
    and the receivers (preamplifiers) as projectors or hydrophones respectively. Expectations from a transducer involve a mixture of acoustical, electrical and mechanical considerations, such as beam pattern, impedance, corrosion resistance and weight. This unusual combination of disciplines with the added concern

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