A compact active sound absorption system compensating near-field effect of the secondary source

• Wang, Jun ^[1] ; Lu, Jing ^[1] ; Qiu, Xiaojun ^[1]
  1. [1] Nanjing University

     Nanjing University

     China

     
• Localización: Noise Control Engineering Journal, ISSN 0736-2501, Vol. 65, Nº. 5, 2017, págs. 482-487
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • In a compact active sound absorption system where the error sensor is close to the secondary source, the near-field effect of the secondary source deteriorates the system performance severely. This study proposes an improved method by employing an auxiliary calibration process, in which an extra sensor is utilized to obtain relevant impulse responses, and then these impulse responses are used in the control process to eliminate the influence of the near-field effect. Experiments are carried out in a compact active sound absorption system in a duct to demonstrate the feasibility of the proposed method.