Two methods for extracting spatially encoded signals from Experimental results including those of listening tests indicate that our proposed method is robust against change in listening position in the recording area.Īn approach is presented to model dynamic source and listener directivity for interactive We develop and evaluate a composite microphone array consisting of multiple small arrays. In the synthesis of the estimated soundfield, a spherical-wave-decomposition-based binaural rendering is also formulated to take into consideration the distance in measuring head-related transfer functions. We propose a method based on harmonic analysis of infinite order, which allows the use of arbitrarily placed microphones. However, owing to the lack of flexibility in the microphone arrangement, the single spherical array is sometimes impractical for estimating a large region of a soundfield. To reproduce binaural signals from microphone array recordings at a remote location, a spherical microphone array is generally used for capturing a soundfield. We also became interested in the instance in which co-occurring real sound sources whose placements are unknown to the user could affect the auditory distance perception of virtual sound sources through an intra-modal calibration effect.Ī method of binaural rendering from microphone array signals of arbitrary geometry is proposed. In particular, the calibration effect induced by the perception of the visual environment on the auditory perception is generally overlooked. In AAR applications, the geometry of the environment is not always completely considered. The second part of the thesis's motivations focuses on how, in AAR applications, environment-related cues could impact the perception of virtual sound sources. By considering different spatial and temporal segmentations, we attempted to characterize how early energy is perceived in relation to reverberation. We examined which strategies for weighting auditory cues are used by the auditory system to create the perception of sound distance. Auditory distance perception is based on a range of cues categorized as acoustic, and cognitive. The first part of the thesis concerns the critical role of acoustic cue reproduction in the auditory distance perception of virtual sound sources in the context of audio-only augmented reality. Different challenges arise from these critical requirements. AAR systems have fundamental requirements as an audio playback system must enable a seamless integration of virtual sound events within the user's environment. AAR refers to a set of technologies that aim to merge computer-generated auditory content into a user's acoustic environment. It focuses on how its specific perceptual context and primary objectives impose constraints on the design of the distance rendering approach used to generate virtual sound sources for AAR applications. This thesis aims to investigate a variety of effects linking the auditory distance perception of virtual sound sources to the context of audio-only augmented reality (AAR) applications.
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