SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "L773:2151 870X OR L773:9781479914814 srt2:(2018)"

Sökning: L773:2151 870X OR L773:9781479914814 > (2018)

  • Resultat 1-2 av 2
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Andersson, Carl, 1992, et al. (författare)
  • A Method for Simultaneous Creation of an Acoustic Trap and a Quiet Zone
  • 2018
  • Ingår i: Proceedings of the IEEE Sensor Array and Multichannel Signal Processing Workshop. - 2151-870X. ; 2018-July, s. 622-626
  • Konferensbidrag (refereegranskat)abstract
    • An acoustical levitation trap can be created by max- imizing the Laplacian of the Gor’kov potential and minimizing the pressure at a given location. Marzo et al. have successfully used Broyden-Fletcher-Goldfarb-Shanno minimization to find the phases to be imposed on the elements of an ultrasonic transducer array to create the required pressure field. We extend this method to create a field with one acoustical trap and a quiet zone at a different location. This can be used to, for example, create an independent second trap at the location of the quiet zone. We show through numerical simulations that it is possible to create such sound fields using ultrasonic arrays, and we demonstrate the advantages of the proposed approach over the direct design of a sound field with more than one trap. Our method can create a quiet zone extending almost two wavelengths without affecting the levitation trap.
  •  
2.
  • Ma, Xiaohui, et al. (författare)
  • Listener-Position Adaptive Crosstalk Cancelation Using A Parameterized Superdirective Beamformer
  • 2018
  • Ingår i: Proceedings of the IEEE Sensor Array and Multichannel Signal Processing Workshop. - 2151-870X. ; 2018-July, s. 114-118
  • Konferensbidrag (refereegranskat)abstract
    • We present a method for cancelation of the acoustic crosstalk between the ears of a listener using a linear loudspeaker array. This allows for controlling the signals that arise at listener's ear independently of each other so that binaural cues can be imposed. We employ superdirective near-field beamforming (SDB) over the vast part of the frequency range. Allowing the listener to move in front of the array requires the computation of a new SDB solution for each possible position of the listener, which is a computationally expensive procedure. We show that the beamformer weights exhibit a very smooth evolution for listening positions along a line parallel to the array. This makes it straightforward to parameterize pre-computed beamformer weights with a few parameters for each frequency. Upon realtime execution, the beamformer weights can be determined efficiently for any arbitrary position along the listener contour from the parameters with negligible error. Simulation results show that the proposed beamformer provides a higher channel separation than previously published solutions while maintaining robustness.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-2 av 2
Typ av publikation
konferensbidrag (2)
Typ av innehåll
refereegranskat (2)
Författare/redaktör
Ahrens, Jens, 1978 (2)
Hohnerlein, Christop ... (1)
Andersson, Carl, 199 ... (1)
Ma, Xiaohui (1)
Lärosäte
Chalmers tekniska högskola (2)
Språk
Engelska (2)
Forskningsämne (UKÄ/SCB)
Teknik (2)
Naturvetenskap (1)
År
2018 (2)Ta bort avgränsningen

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy