Thursday, September 29, 4:00 pm — 5:30 pm (Rm 402AB)
Line arrays, sound bars, and other loudspeaker systems using multiple transducers in large enclosures require a big anechoic measurement room with proper wall treatment and climate conditioning to ensure acoustical measurements under far field condition. Scanning the near field of the loudspeaker output and holographic processing of the measured data is an interesting alternative to far field measurements to improve the accuracy and the angular resolution of the directivity pattern within a shorter measurement time. Scanning the near field also has the added benefit of measurement under less than anechoic conditions. This tutorial explains the theoretical basis of the new technique, shows the practical application to professional and consumer loudspeaker, and discusses the consequences for the development of active loudspeaker measurements with active control of the directional properties (beam steering).
|This session is presented in association with the AES Technical Committee on Loudspeakers and Headphones|