Search results for: parametric array

• Gdansk Bay sea bed sounding and classification of its results

  Publication

  • G. Grelowska
  • E. Kozaczka
  • S. Kozaczka

  - Polish Maritime Research - Year 2013

  The main goal of this paper is to describe the results of sounding the Gdansk Bay sea bed by using a SES-2000 Standard parametric sub-bottom profiler. Quality of data obtained during trials depends inter alia on a proper location of transducer array to reduce influence of pitch, roll and heave motions as well as ship self noise (resulting from bubbles due to propeller and flow around hull, vibration generated by main engine and...

  Full text available to download

• Examining Acoustic Emission of Engineered Ultrasound Loudspeakers

  Publication

  • P. Bratoszewski
  • J. Cichowski
  • A. Czyżewski

  - Year 2014

  Measurement results of the sound emitted from an ultrasound custom-made system with high spatial directivity are presented. The proposed system is using modulated ultrasound waves which demodulate in nonlinear medium resulting in audible sound. The system is aimed at enhancing the users’ personal audio space, therefore the measurements are performed using the Head and Torso Simulator which provides the realistic reproduction of...

• Measurements and Simulations of Engineered Ultrasound Loudspeakers

  Publication

  • P. Bratoszewski
  • J. Cichowski
  • A. Czyżewski

  - Computational Methods in Science and Technology - Year 2015

  Simulation and measurement results of the sound emitted from an ultrasound custom-made system with high spatial directivity are presented. The proposed system is using modulated ultrasound waves which demodulate in nonlinear medium resulting in audible sound. The system is aimed at enhancing the users’ personal audio space, therefore the measurements are performed using the Head and Torso Simulator which provides realistic reproduction...

  Full text to download in external service