Acoustic source‐level measurements for a variety of merchant ships

1991 ◽  
Vol 89 (2) ◽  
pp. 691-699 ◽  
Author(s):  
Paul Scrimger ◽  
Richard M. Heitmeyer
Keyword(s):  
Acoustic Source ◽  
Source Level

Opto-Spectrum Measurement and Analysis of Underwater Plasma Acoustic Source Pulse Discharge

2011 ◽  
Vol 105-107 ◽  
pp. 1872-1875
Author(s):  
Jun Zhang ◽  
Xin Wu Zeng ◽  
Yi Bo Wang ◽  
Dan Chen
Keyword(s):  
Arc Discharge ◽  
Pulse Discharge ◽  
Pulse Length ◽  
High Voltage Pulse ◽  
Discharge Voltage ◽  
Profile Measurement ◽  
Acoustic Source ◽  
Spectrum Measurement ◽  
Long Time ◽  
Source Level

Underwater plasma acoustic source (UPAS) with high voltage pulse arc discharge produced pressure wave has the advantage of adjustable pulse length, high source level output, and no pollution to the environment. In recent years, this kind of source has been gradually used in domain as long range target detection, geo-acoustic profile measurement, and frogman threats deposal etc. While for a fairly long time, we’re lack of research on the company product of sound—light. In this paper, we measured the opto-spectrum of UPAS by experiment, and found its spectrum is of continuous spectrum and its dominant energy is around 500nm, if we raise the discharge voltage, reduce the gap distance of the tips, the spectrum amplitude and half peak amplitude width will increase, and if we change steel tips with copper tips, the light energy distribution and amplitude of the spectrum will change.

On the dipole acoustic source level of breaking waves

1994 ◽  
Vol 96 (5) ◽  
pp. 3036-3044 ◽  
Author(s):  
Li Ding ◽  
David M. Farmer
Keyword(s):  
Breaking Waves ◽  
Acoustic Source ◽  
Source Level

scholarly journals Shock formation and cavitation as limitations on acoustic source level

1978 ◽  
Vol 63 (S1) ◽  
pp. S9-S10
Author(s):  
F. R. Horneck ◽  
J. W. Young
Keyword(s):  
Shock Formation ◽  
Acoustic Source ◽  
Source Level

scholarly journals Multichannel acoustic source and image dataset for the cocktail party effect in hearing aid and implant users

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Tim Fischer ◽  
Marco Caversaccio ◽  
Wilhelm Wimmer
Keyword(s):  
Hearing Aids ◽  
Scientific Community ◽  
Cocktail Party ◽  
Acoustic Source ◽  
Image Dataset ◽  
Cocktail Party Effect ◽  
Spatial Coordinates ◽  
Acoustic Chamber ◽  
Human Hearing ◽  
Human Sense

AbstractThe Cocktail Party Effect refers to the ability of the human sense of hearing to extract a specific target sound source from a mixture of background noises in complex acoustic scenarios. The ease with which normal hearing people perform this challenging task is in stark contrast to the difficulties that hearing-impaired subjects face in these situations. To help patients with hearing aids and implants, scientists are trying to imitate this ability of human hearing, with modest success so far. To support the scientific community in its efforts, we provide the Bern Cocktail Party (BCP) dataset consisting of 55938 Cocktail Party scenarios recorded from 20 people and a head and torso simulator wearing cochlear implant audio processors. The data were collected in an acoustic chamber with 16 synchronized microphones placed at purposeful positions on the participants’ heads. In addition to the multi-channel audio source and image recordings, the spatial coordinates of the microphone positions were digitized for each participant. Python scripts were provided to facilitate data processing.

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