144th AES CONVENTION Paper Session P14: Perception — Part 1

AES Milan 2018
Paper Session P14

P14 - Perception – Part 1

Thursday, May 24, 16:15 — 17:45 (Scala 4)

Christof Faller, Illusonic GmbH - Uster, Zürich, Switzerland; EPFL - Lausanne, Switzerland

P14-1 The Standard Deviation of the Amplitude Spectrum as a Predictor of the Perception of the 'Power' of Distorted Guitar TimbreKoji Tsumoto, Tokyo University of the Arts - Adachi-ku, Tokyo, Japan; Atsushi Marui, Tokyo University of the Arts - Tokyo, Japan; Toru Kamekawa, Tokyo University of the Arts - Adachi-ku, Tokyo, Japan
The perception of the wildness and heaviness of distorted guitar timbre can be compiled as one attribute associated with the "power" according to our previous study. The amount of distortion is one of the predictors of the perception of the "power." Although the predictor of the "power" other than the amount of distortion is yet to be known, the existence of a predictor for the subtle differences of the "power" can be assumed from the engineering perspective. Specifically, the amount of even and odd harmonics are altered by the symmetrical or asymmetrical placements of the diodes in the distortion effect pedal. We investigated how these changes affect the perception of "power." The spectral centroids of the stimuli were equalized to eliminate the influence of the perception of "brightness" over "power." A pairwise comparison was conducted for the stimuli of three different amounts of distortion and three types of diode placements. Regression analysis indicated that the Standard Deviation of the Amplitude Spectrum seemed to be an appropriate predictor of the perception of "power."
Convention Paper 9971 (Purchase now)

P14-2 Categorization of Isolated Sounds on a Background—Neutral—Foreground ScaleWilliam Coleman, Dublin Institute of Technology - Dublin, Ireland; Charlie Cullen, University of the West of Scotland - UK; Ming Yan, DTS Licensing Inc. - UK
Recent technological advances have driven changes in how media is consumed in home, automotive, and mobile contexts. Multichannel audio home cinema systems are not ubiquitous but have become more prevalent. The consumption of broadcast and gaming content on smart-phone and tablet technology via telecommunications networks is also more common. This has created new possibilities and consequently poses new challenges for audio content delivery such as how media can be optimized for multiple contexts while minimizing file size. For example, a stereo audio file may be adequate for consumption in a mobile context using headphones, but it is limited to stereo presentation in the context of a surround-sound home entertainment system. Another factor is the variability of telecommunications network bandwidths. Object-based audio may offer a solution to this problem by providing audio content on an object level with metadata that controls how the media is delivered depending on the consumption paradigm. In this context, insight into the relative importance of different sounds in the auditory scene will be useful in forming content delivery strategies. This paper presents the results of a listening test investigating categorization of isolated sounds on a Background (BG) — Neutral (N) — Foreground (FG) scale. A continuum of importance was observed among the sounds tested and this shows promise for application in object-based audio delivery.
Convention Paper 9972 (Purchase now)

P14-3 The Relevance of Auditory Adaptation Effects for the Listening Experience in Virtual Acoustic EnvironmentsFlorian Klein, Technische Universität Ilmenau - Ilmenau, Germany; Stephan Werner, Technische Universität Ilmenau - Ilmenau, Germany
Virtual acoustic environments can provide a plausible reproduction of real acoustic scenes. Since the perceived quality is based on expectations and previous sound exposure, a reliable measure of the listening experience is difficult. Listeners are able to learn how to interpret spatial cues and room reflections for certain tasks. To discuss the relevance of auditory adaptation effects, this paper summarizes a series of listening experiments that show adaptation processes with effect on localization accuracy, externalization, and the ability of a listener to identify the own position in a virtual acoustic environment.
Convention Paper 9973 (Purchase now)

Return to Paper Sessions