Ultra low frequency electromagnetic underwater sound source

2014 ◽  
Vol 136 (4) ◽  
pp. 2318-2318
Author(s):  
Wei Lu ◽  
Yu Lan
Keyword(s):  
Sound Source ◽  
Low Frequency ◽  
Underwater Sound

Resonance Low Frequency Sound Source With Extended Frequency Band

1995 ◽  
Author(s):  
Dimitri M. Donskoy ◽  
Jan Nazalewicz
Keyword(s):  
Frequency Band ◽  
Sound Source ◽  
Digital Signal Processor ◽  
Frequency Control ◽  
Low Cost ◽  
Reaction Force ◽  
Double Resonance ◽  
Low Frequency ◽  
Underwater Sound ◽  
Compact Size

Abstract A new concept of a low-frequency (< 1000-Hz) underwater sound source has been proposed and tested (Donskoy and Blue, 1994). The present work is a further development of the source. A full scale reaction force driver to power the source was developed, built, and tested. In order to extend frequency band of the source, a double resonance approach (resonating reaction mass and resonating radiation piston) was employed. This approach allows for a significant extension (up to 400%) of the frequency band without an increase in a vibromotive force. The driver consists of a brushless servomotor, a brushless resolver for feedback, a Digital Signal Processor (DSP) based servo amplifier, and an interface with a PC. Vibromotive force is created with an eccentric weight mounted to a resonating mechanical structure. The driver can generate up to 8.000 lbs force, it has a programmable frequency control in the range up to 117 Hz, high power output (3.3 kW), compact size, low weight, and relatively low cost.

A new concept of a low‐frequency underwater sound source

1994 ◽  
Vol 95 (4) ◽  
pp. 1977-1982 ◽  
Author(s):  
Dimitri M. Donskoy ◽  
Joseph E. Blue
Keyword(s):  
Sound Source ◽  
Low Frequency ◽  
Underwater Sound

A Low Frequency Underwater Sound Source with an Acoustic Reel Shape Resonator

1990 ◽  
Vol 29 (S1) ◽  
pp. 83
Author(s):  
Hiroyuki Hachiya ◽  
Shigeo Ohtsuki ◽  
Motoyoshi Okujima
Keyword(s):  
Sound Source ◽  
Low Frequency ◽  
Underwater Sound

Response of the Lungs to Low Frequency Underwater Sound.

1994 ◽  
Author(s):  
Peter H. Rogers ◽  
Gary W. Caille ◽  
Thomas N. Lewis
Keyword(s):  
Low Frequency ◽  
Underwater Sound

Low-Frequency Sound Source with Dual Bending Radiation Surfaces

1998 ◽  
Vol 37 (Part 1, No. 5B) ◽  
pp. 3161-3165 ◽  
Author(s):  
Mitsuru Yamamoto ◽  
Hiroshi Ishimura ◽  
Yoshinori Hama ◽  
Takeshi Inoue
Keyword(s):  
Sound Source ◽  
Low Frequency ◽  
Frequency Sound
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