Saturday, October 1, 10:45 am — 11:30 am (Rm 403A)
Dylan Menzies, University of Southampton - Southampton, UK
EB3-1 A Perceptual Approach to Object-Based Room Correction—Dylan Menzies, University of Southampton - Southampton, UK; Filippo Maria Fazi, University of Southampton - Southampton, Hampshire, UK
Object-based audio offers some advantages over conventional channel-based reproduction. Objects can be adapted based on conditions at each reproduction site, in order to improve the overall quality or according to listener preferences. In particular, if the direct and reverberant parts of objects are separately available, more freedom is available to compensate for the effects of the reproduction room. An overview is provided here of a practical approach to such room correction that can modify the object stream in real-time based on captured acoustic properties of the room.
Engineering Brief 295 (Download now)
EB3-2 The Physical Limit of Microspeakers—Kang Hou, GoerTek Electronics - Santa Clara, CA, USA; Ming Hui Shao, GoerTek Audio Technologies - China
Audio playback in portable devices might be the most challenging and least satisfactory in acoustic fields. The rising of new audio hardware and software bring some silver lights and push the components to it limits. The physical limit and some practical design guidelines of micro-speakers are discussed in this paper.
Engineering Brief 296 (Download now)
EB3-3 Line Arrays: a General Study of Space Dependent Frequency Response—Mario Di Cola, Audio Labs Systems - Casoli, Italy; Paolo Martignon, Dott., Audio Labs Systems - Parma (PR), Italy
Vertical line arrays are nowadays the standard solution for large scale sound reinforcement for several well known advantages. But they carry also critical issues, like distance dependent frequency response, governed by parameters like single box height, HF vertical dispersion, as well as array length and curvature. On the field this leads to solutions that goes from array shape optimization to multichannel DSP processing (relying on a prediction software). The authors felt the necessity to investigate distance dependent frequency response with a simple and quite general (Matlab) model, not based on single element measurements but on parametric curved sub-arrays, in order to explain the very nature of involved phenomena with simplicity and generality and graph results in a meaningful way.
Engineering Brief 297 (Download now)