BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System
Omnidirectional Spherical Hydrophone
BII7000 Series Omnidirectional Spherical Hydrophone
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. Service temperature can be customized to 200°C or 392°F. 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.
Low Frequency Sounds in the Ocean at 1 Hz to 1 kHz. Low Frequency Sounds between 1Hz to 1kHz undergo little attenuation in ocean and lakes: 1.2x10-7 at 1Hz, 0.0002 at 10Hz, 0.0015 at 100Hz, 0.07 at 1kHz, in dB/km, proximately. The major propagation losses are Spreading Loss, Absorption and Scattering at boundaries such as seafloor sediments. The sounds being trapped in deep sound channel or SOFAR channel avoiding losses from both top and bottom boundaries can propagate very big area with very low loss. These low frequency sounds contain valuable information on their sources and propagation areas such as Weathers (Winds, Rains, Surface Waves, Ice, Storms, …), Geological Process (Earthquakes, Tsunamis, Moving of Tectonic Plates and Crusts,…), Marine Animals (Whales, Dolphins, Fish, Invertebrates, …), Anthropogenic Activities (Shipping, Harbor, Oil and Wind Energy Extraction, Air Guns, …). Besides sounds detection or monitoring with deployment at 1000m depth, the distributed hydrophone network in shallow water (at a specific depth) can also be used to detect and monitor upward sounds being refracted from SOFAR channel.
| Typical Applications | |
| Sonobuoy, Dipping Hydrophone. LBL, SBL, USBL Positioning. Parabolic Antennas Underwater. Reference Hydrophone, Noise Measurement. |
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. |
| Related Products | |
| BII1000 Hydrophone Preamplifier. | BII7010 Low Noise Broadband Hydrophone, Low Cost. |
| BII7040 Hemispherical Hydrophone. | BII7120 Low Noise Hydrophone: Below Sea-state Zero. |
| Acoustic Transducers and Measurement Systems: Installation/Mounting, Ordering, Wiring, Array & Aperture Design and much more. |
Specification
| Omnidirectional Spherical Hydrophone |
| Hydrophone | Sensitivity, dBV/µPa. | Usable Frequency | Depth Rating | No Preamp | Built-in Preamp |
| BII7001 Series | -196 + Preamp Gain | 0.3Hz to 180kHz | 900m | Datasheet | Datasheet |
| BII7002 Series | -190 + Preamp Gain & Low Noise | 0.1Hz to 80kHz | 400m | Datasheet | Datasheet |
| BII7003 Series | -211 + Preamp Gain, up to 200°C. | 5.0Hz to 560kHz | 400m | Datasheet | Datasheet |
| BII7005 Series | -205 + Preamp Gain | 1.6Hz to 400kHz | 500m | Datasheet | Datasheet |
| BII7006 Series | -215 + Preamp Gain | 1.0Hz to 600kHz | 400m | Datasheet | N/A |