AES New York 2013
Poster Session P6
P6 - Spatial Audio
Thursday, October 17, 3:00 pm — 4:30 pm (1EFoyer)
P6-1 Improvement of 3-D Sound Systems by Vertical Loudspeaker Arrays—Akira Saji, University of Aizu - Aizuwakamatsu City, Japan; Keita Tanno, University of Aizu - Aizuwakamatsu, Fukushima, Japan; Jie Huang, University of Aizu - Aizuwakamatsu City, Japan
Recently we proposed a 3-D sound system using a horizontal arrangement of loudspeakers by combining the effect of HRTF and the amplitude panning method. In that system, loudspeakers are set at the height of subject's ear level and its sweet-spot is limited by the height of loudspeakers. When the listener's ear level is different from the loudspeakers, it will cause difficulty of sound localization or breakdown of sound localization. However, it is difficult to adjust properly both the height of loudspeakers and subject's ear level every time. In this paper we aimed to improve the robustness of the 3-D sound system using vertical loudspeaker arrays. As a result of experiments, we prove that the loudspeaker arrays can improve the robustness of the 3-D sound system.
Convention Paper 8944 (Purchase now)
P6-2 An Integrated Algorithm for Optimized Playback of Higher Order Ambisonics—Robert E. Davis, University of the West of Scotland - Paisley, Scotland, UK; D. Fraser Clark, University of the West of Scotland - Paisley, Scotland, UK
An algorithm is presented that gives improved playback performance of higher order ambisonic material on practical loudspeaker arrays. The optimizations are based on sound field reproduction theories with additional parameters to account for the compensation of loudspeaker and listener positioning constraints and numbers of listeners. Automatic calculation of loudspeaker distances is also achieved based on room dimensions and a gain calibration routine is incorporated. Results are given to quantify the resulting algorithm performance, informal listening tests were carried out, and aspects of implementation are discussed.
Convention Paper 8945 (Purchase now)
P6-3 I Hear NY3D: Ambisonic Capture and Reproduction of an Urban Sound Environment—Braxton Boren, New York University - New York, NY, USA; Areti Andreopoulou, New York University - New York, NY, USA; Michael Musick, New York University - New York, NY, USA; Hariharan Mohanraj, New York University - New York, NY, USA; Agnieszka Roginska, New York University - New York, NY, USA
This paper describes “I Hear NY3D,” a project for capturing and reproducing 3D soundfields in New York City. First order Ambisonic recordings of various locations in Manhattan have taken place, to be used for both aesthetic and informational purposes. The collected data allows for the creation of high quality, fully immersive auditory soundscapes that can be played back at any periphonic speaker array configuration through real time matrixing. Binaural renderings of the same data are also available for more portable applications.
Convention Paper 8946 (Purchase now)
P6-4 I Hear NY3D: An Ambisonic Installation Reproducing NYC Soundscapes—Michael Musick, New York University - New York, NY, USA; Areti Andreopoulou, New York University - New York, NY, USA; Braxton Boren, New York University - New York, NY, USA; Hariharan Mohanraj, New York University - New York, NY, USA; Agnieszka Roginska, New York University - New York, NY, USA
This paper describes the development of a reproduction installation for the "I Hear NY3D" project. This project’s aim is the capture and reproduction of immersive soundfields around Manhattan. A means of creating an engaging reproduction of these soundfields through the medium of an installation will also be discussed. The goal for this installation is an engaging, immersive experience that allows participants to create connections to the soundscapes and observe relationships between the soundscapes. This required the consideration of how to best capture and reproduce these recordings, the presentation of simultaneous multiple soundscapes, and a means of interaction with the material.
Convention Paper 8947 (Purchase now)
P6-5 Auralization of Measured Room Impulse Responses Considering Head Movements—Anthony Parks, Rensselaer Polytechnic Institute - Troy, NY, USA; Jonas Braasch, Rensselaer Polytechnic Institute - Troy, NY, USA; Samuel W. Clapp, Rensselaer Polytechnic Institute - Troy, NY, USA
The purpose of this paper is to describe a novel method for auralizing measured room impulse responses over headphones using impulse responses recorded from a 16-channel spherical microphone array decoded to eight virtual loudspeakers mixed-down binaurally using nonindividualized HRTFs. The novelty of this method lies not in the ambisonic binaural-mixdown process, but rather, the use of head pose estimation code from the Kinect API sent to a Max/MSP patch using Open Sound Control messages. This provides a fast, reliable alternative to auralizations over headphones that allow for head movements without the need for head-related transfer function interpolation by performing a rotation on the spherical harmonic that corresponds to the listener's head rotation.
Convention Paper 8948 (Purchase now)
P6-6 Reduced Representations of HRTF Datasets: A Discriminant Analysis Approach—Areti Andreopoulou, New York University - New York, NY, USA; Agnieszka Roginska, New York University - New York, NY, USA; Juan Pablo Bello, New York University - New York, NY, USA
This paper discusses reduced representations of HRTF datasets, fully descriptive of one’s personalized properties. The data reduction is achieved through elimination of the least discriminative binaural-filter pairs from a set. For this purpose Linear Discriminant Analysis (LDA) was applied on the Music and Audio Research Laboratory (MARL) database of repeated HRTF measurements, which resulted in 67% data reduction. The effectiveness of the sparse HRTF mapping is assessed by way of the performance of a database matching system, followed by a subjective evaluation study. The results indicate that participants have demonstrated strong preference towards the selected HRTF sets, in contrast to the generic KEMAR set and the least similar selections from the repository.
Convention Paper 8949 (Purchase now)
P6-7 Investigation of HRTF Sets Using Content with Limited Spatial Resolution—Johann-Markus Batke, Audio & Acoustics, Technicolor Research & Innovation - Hannover, Germany; Stefan Abeling, Audio & Acoustics, Technicolor Research & Innovation - Hannover, Germany; Stefan Balke, Leibniz Universität Hannover - Hannover, Germany; Gerald Enzner, Ruhr-Universität Bochum - Bochum, Germany
Headphone rendering of sound fields represented by Higher Order Ambisonics (HOA) is greatly facilitated by the binaural synthesis of virtual loudspeakers. Individualized head-related transfer function (HRTF) sets corresponding to the spatial positions of the virtual loudspeakers are used in conjunction with head-tracking to achieve the externalization of the sound event. We investigate the localization accuracy for HOA representations of limited spatial resolution using individualized and generic HRTF sets.
Convention Paper 8950 (Purchase now)