title: Low-frequency source for very long-range underwater communication.
abstract: Very long-range underwater acoustic communication (UAC) is crucial for long cruising (>1000 km) autonomous underwater vehicles (AUVs). Very long-range UAC source for AUV must exhibit high electro-acoustic efficiency (>60%) and compactness. This paper describes the Janus-Hammer Bell (JHB) transducer that has been designed for this purpose and meets those requirements. The transducer works on the 450-550 Hz bandwidth and reaches source level above 200 dB (ref. 1 μPa at 1 m) with 1 kW excitation and full immersion capability. JHB source has been used for communication experiments by the Japanese institute for marine technology (Japan Agency for Marine-Earth Science and Technology) achieving a baud rate of 100 bits/s at 1000 km.
authors.affiliation: Acoustic Research and Technology Group, Sonar System Division, IXBLUE, 46 Quai F.Mitterrand, 13600 La Ciotat, France. frederic.mosca@ixblue.com
authors.forename: Frédéric
authors.initials: F
authors.lastname: Mosca
authors.forename: Guillaume
authors.initials: G
authors.lastname: Matte
authors.forename: Takuya
authors.initials: T
authors.lastname: Shimura
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D004867:Equipment Design; D020342:Finite Element Analysis; D008962:Models, Theoretical; D009038:Motion; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013685:Telecommunications / Q000295:instrumentation*; D013997:Time Factors; D014159:Transducers; D014867:Water
chemical_list: D014867:Water