Benthowave Instrument BII7005FGDF Quick Start Manual

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BII's spherical hydrophones provide omnidirectional responses up to 700kHz and offer excellent acoustic characteristics of low noise and durability, which make these
hydrophones ideal for a wide range of oceanography applications. Bespoke built-in preamplifiers allow the hydrophones to be used with long extension cables with no
loss in sensitivity. The customized built-in filters increase Signal-to-Noise Ratio, reject unwanted noise, and avoid saturation.
Typical Applications
Sonobuoy, Dipping Hydrophone.
LBL, SBL, USBL Positioning, Communication.
Parabolic Antennas Underwater.
Reference Hydrophone, Noise Measurement.
Underwater Sound Listening, Recording, and Communication
Typical Applications
Underwater Sounds Recording, Listening, and Communication, Noise Measurement, Marine Bioacoustics, Passive Acoustic Monitoring (PAM System).
Coastal/Offshore Processes, Engineering & Management, Wave-Structure Interaction, Wave-height Sensor, Wave and Tide Recorder/Logger.
Surface Waves, Ocean Turbulences, Hydrodynamics, Marine Geophysics, Battery-Powered Instruments: Sonobuoy, Recorder, Transponder, Acoustic Release...
Questions
How do I set up my professional sound recorders to work with BII Hydrophones?
1. BII hydrophones have their own DC power supply to support Line Input of recorders, and Do NOT use phantom power 48V which may destroy the hydrophones.
2. Maximum Input Level (Line Input) of recorders should be large enough to avoid saturation or clipping during recording.
Equivalent Input Noise of recorders should be low enough for the recorders to be sensitive to weak signal of the interest.
3. Sampling Rate of the recorder should be fast enough to avoid missing high frequency sound of the interest. Generally, the Sampling Rate should be at least two times
greater than the maximum frequency of sound.
4. Calculate the memory size of data storage according to sampling rate, resolution, sampling channels, and recording time, and use suitable recording media.
5. Calculate battery service life according to battery power and consuming current.
6. When the cable is greater than 5m, balanced signal or differential signal is recommended to be in use over the cable.
How do I playback the recorded sounds in water?
System Setup: Recorder (Recorded Sounds) with Line or Phone Output ->
Benthowave Instrument Inc.
Underwater Sound Solutions
Omnidirectional Spherical Hydrophone
BII Hydrophone
Audio Power Amplifiers
www.benthowave.com
BII7005PGDF
Detection of Ultrasonic Cavitation Noise, Thermoacoustics in Gas.
Passive Acoustic Monitoring (PAM System).
Array Element, Vector Hydrophone Element.
Marine Bioacoustics, Phantom-power Hydrophone, Sound Recording.
Headphone
Speaker
Sound Recorder
DAQ + Computer
Oscilloscope
BII Hydrophone
Sound Recorder
Sound Transmitter
-> Impedance Matching Device
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REVISED on 2025/2/27.
PA + Impedance Matching
BII Transducer
BII Transducer
-> Transducers (Projectors).