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检索条件"任意字段=2023 Immersive and 3D Audio: from Architecture to Automotive, I3DA 2023"

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Effects of Modified Late Reverberation on audio-Visual Plausibility and Externalization in AR

Effects of Modified Late Reverberation on Audio-Visual Plaus...

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immersive and 3d audio: from architecture to automotive (i3da)

作者： Christian Schneiderwind Maike Richter Nils Merten Annika Neidhardt Electronic Media Technology Group Technische Universität Ilmenau Ilmenau Germany Brandeburg Labs GmbH Ilmenau Germany Institute of Media Technology Technische Universität Ilmenau Ilmenau Germany

Binaural synthesis systems can create virtual sound sources that are indistinguishable from reality. in Augmented Reality (AR) applications, virtual sound sources need to blend in with the real environment to create plausible illusions. However, in some scenarios, it may be desirable to enhance the natural acoustic properties of the virtual content to improve speech intelligibility, alleviate listener fatigue, or achieve a specific artistic effect. Previous research has shown that deviating from the original room acoustics can degrade the quality of the auditory illusion, often referred to as the room divergence effect. This study investigates whether it is possible to modify the auditory aesthetics of a room environment without compromising the plausibility of a sound event in AR. To accomplish this, the length of the reverberation tails of measured binaural room impulse responses are modified after the mixing time to change reverberance.A listening test was conducted to evaluate the externalization and audio-visual plausibility of an exemplary AR scene for different degrees of reverberation modification. The results indicate that externalization is unaffected even with extreme modifications (such as a stretch ratio of 1.8). However, audio-visual plausibility is only maintained for moderate modifications (such as stretch ratios of 0.8 and 1.2).

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Effects of the Types of Headphones and Sound Sources on Spatial audio Quality

Effects of the Types of Headphones and Sound Sources on Spat...

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immersive and 3d audio: from architecture to automotive (i3da)

作者： Yoshiharu Soeta Takanobu Nishiura Biomedical Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Osaka Japan Graduate School of Information Science and Engineering Ritsumeikan University Shiga Japan

Acoustic characteristics of sound fields reproduced by headphones are a major concern to evaluate spatial audio quality. Several specifications exist for acoustic attributes, including frequency response, impedance, and sensitivity. While prior research has illuminated these acoustic features, it falls short in evaluating the spatial audio quality produced by headphones. Such studies don't sufficiently detail the impact of headphones and sound sources. in this study, we carried out psychological evaluations and acoustical measurements of sound fields reproduced by headphones to identify the acoustic elements that account for the spatial audio quality rendered by the headphones. Three types of sound excerpts were played with seven types of headphones, and the psychological evaluations were carried out by 30 participants. Envelopment and apparent source width were evaluated as psychological evaluations. from the binaural impulse response, we determined the center time (Ts), the maximum value (iACC) of the interaural cross-correlation function (iACF), and the iACC width (W iACC ). We derived the iACF and auto-correlation function (ACF) parameters from the recorded sound sources. The traits of both the headphones and the sound source influenced the psychological assessments. The variation in spatial audio quality across headphones and sound sources can be attributed to the peak value of the initial maximum amplitude of the ACF, Ts, and W iACC .

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Experimental Study of Various Methods for Low Frequency Spatial audio Reproduction Over Loudspeakers

Experimental Study of Various Methods for Low Frequency Spat...

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Conference on immersive and 3d audio - from architecture to automotive (i3da)

作者： Hollebon, Jacob Fazi, Filippo Maria Univ Southampton Inst Sound & Vibrat Res Southampton Hants England

ISBN: (纸本)9781665409988

in previous work it was shown that, at low frequencies, a number of audio reproduction techniques, including the stereo sine law, stereo tangent law, head-tracked sine law (or Compensated Amplitude Panning) and crosstalk cancellation all form a subset of first order Ambisonics and can therefore be analysed under one generalised framework. This paper expands and validates these results through objective experiments in an anechoic environment. For each of the spatial audio techniques the spherical harmonic components of the reproduced sound field of a single virtual source, as well as the reproduced binaural cues, are analysed and compared to those of an equivalent real source. The results of these measurements are in good agreement with the theoretical advances previously developed further validating, at low frequencies, the link between the otherwise disparate panning laws, binaural techniques and soundfield reconstruction approaches to spatial audio.

关键词： Spatial audio Soundfield Reconstruction Binaural Ambisonics Panning

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Towards the evaluation of marine acoustic biodiversity through data-driven audio source separation

Towards the evaluation of marine acoustic biodiversity throu...

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immersive and 3d audio: from architecture to automotive (i3da)

作者： Michele Mancusi Nicola Zonca Emanuele Rodolà Silvia Zuffi GLADIA Research Group Sapienza University of Rome Rome Italy Native Prime Bologna Italy IMATI-CNR National Biodiversity Future Center NBFC

The marine ecosystem faces alarming changes, including biodiversity loss and the migration of tropical species to temperate regions. Monitoring underwater environments and their inhabitants is crucial, but challenging in vast and uncontrolled areas like oceans. Passive acoustics monitoring (PAM) has emerged as an effective method, using hydrophones to capture underwater sound. Soundscapes with rich sound spectra indicate high biodiversity, soniferous fish vocalizations can be detected to identify specific species. Our focus is on sound separation within underwater soundscapes, isolating fish vocalizations from background noise for accurate biodiversity assessment. To address the lack of suitable datasets, we collected fish vocalizations from online repositories and captured sea soundscapes at various locations. We propose an online generation of synthetic soundscapes to train two popular sound separation networks. Our study includes comprehensive evaluations on a synthetic test set, showing that these separation models can be effectively applied in our settings, yielding encouraging results. Qualitative results on real data showcase the model's generalization ability. Utilizing sound separation networks enables automatic extraction of fish vocalizations from PAM recordings, enhancing biodiversity monitoring and capturing animal sounds in their natural habitats.

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A Head-Mounted Microphone Array for Binaural Rendering

A Head-Mounted Microphone Array for Binaural Rendering

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Conference on immersive and 3d audio - from architecture to automotive (i3da)

作者： Ahrens, Jens Helmholz, Hannes Alon, david Lou Gari, Sebastia V. Amengual Chalmers Univ Technol S-41296 Gothenburg Sweden Facebook Facebook Real Labs Res 1 Hacker Way Menlo Pk CA 94025 USA

ISBN: (纸本)9781665409988

We recently presented a method for obtaining a spherical harmonic representation of a sound field based on microphones along the equator of a rigid spherical object that ideally has a size similar to that of a human head. We refer to this setup as an equatorial microphone array. Even more recently, we presented an extension of this method that allows for employing a scattering object that is approximately spherical such as a human head. The present paper provides an overview as well as a juxtaposition of the two solutions. We present an instrumental evaluation based on the application of binaural rendering of the captured sound fields by analysing simulated binaural transfer functions of both methods for a variety of scenarios.

关键词： Binaural audio spherical microphone array equatorial microphone array virtual reality

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iSO X3d 4.0 audio Graph for web3d applications. Latest trends in declarative 3d sound for the web

ISO X3D 4.0 Audio Graph for web3D applications. Latest trend...

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immersive and 3d audio: from architecture to automotive (i3da)

作者： Maria Papadaki don Brutzman Eftychia Lakka Richard Puk Georgios daskalakis Athanasios G. Malamos Dept of Electrical and Computer Engineering Hellenic Mediterranean University Heraklion Greece Naval Postgraduate School (NPS) Monterey California USA Faculty of Computing Engineering and Science University of South Wales UK Intelligraphics Inc.

Our work, as 3d audio Working Group of Web3d Consortium, aims to integrate acoustic properties associated with geometric shapes together with 3d spatial sound and insert this new technology into the X3d v4.0 iSO standard. in this paper we present X3d 4.0 audio Graph APi as it is embedded with all the latest improvements and examples. Moreover, we introduce novel ideas and use cases on how X3d v4.0 may improve immersion experience in Metaverse games, theatre or music performances and concerts. in this paper we introduce new audio components of the X3d standard and we present a case study of a platform that enhances users’ experience in scenarios of live online performances, mainly theater or music concerts, by enriching the realism of the streamed audio through auralization and virtual specialization. Our strong point is that we manage to include all the necessary information inside the scene nodes and combine three technologies that serve different purposes to work harmonically together, allowing multiple people to stream and enjoy the performance as they would in a real theater. We achieve this goal by joining state of the art technologies that involves web3d, teleconferencing and sound. Thus we may encourage community to create new real time applications like virtual theatre or tele-orchestras.

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A Human Head Shaped Array of Microphones and Cameras for automotive Applications

A Human Head Shaped Array of Microphones and Cameras for Aut...

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Conference on immersive and 3d audio - from architecture to automotive (i3da)

作者： Pinardi, daniel Univ Parma Dept Engn & Architecture Parma Italy

ISBN: (纸本)9781665409988

Nowadays, a growing interest in the recording and reproduction of spatial audio was observed. However, despite many microphone arrays were developed in the last years, there are still few solutions for Noise, Vibration and Harshness (NVH) applications at low frequency. in this paper, a new array of microphones and cameras is presented, for recording both acoustic and visual spatial information. it can be used for the spatial analysis and visualization of the sound field and to perform recordings that can be rendered in a virtual reality (VR) environment. The system was optimized for the low frequency range, as most of the available solutions have proved unsatisfactory for frequencies below 400 Hz. Moreover, the system is cost-effective if compared to other existing products designed for similar applications. The spatial performance of the array is evaluated in comparison with the current state of the art systems. Finally, a field application is presented. The new head shaped microphone array demonstrated its effectiveness for evaluating the performance of an automotive Active Noise Control (ANC) system.

关键词： Active Noise Control automotive beamforming microphone array Noise Vibration and Harshness spatial audio

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Rotation Calibration of Rigid Spherical Microphone Arrays for Multi-perspective 6doF audio Recordings

Rotation Calibration of Rigid Spherical Microphone Arrays fo...

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Conference on immersive and 3d audio - from architecture to automotive (i3da)

作者： Olgun, Orhun Erdem, Ege Hacihabiboglu, Huseyin Middle East Tech Univ Grad Sch Informat Ankara Turkey

ISBN: (纸本)9781665409988

The preferred approach for multi-perspective six-degrees-of-freedom (6doF) audio involves using multiple rigid spherical microphone arrays (RSMA) that can capture higher-order Ambisonics. RSMAs are spherically symmetric and allow the calculation of the local decomposition of sound fields over spherical harmonic functions. When multiple such arrays are used, multiple scattering occurs that can be equalized via methods that rely on multipole expansions if the positions of the arrays are known and the coordinate frames of arrays are aligned. in a practical scenario, however, when such a set of arrays are placed in location, their positions will not be exact and their coordinate frames will not be fully aligned. This paper is concerned with the correction of rotational mismatches in azimuth angles of individual RSMAs. The effects of such misalignment on the calculation of the local multipole expansion of the sound field are numerically explored. A rotation calibration approach that depends on non-linear optimisation is proposed. Numerical evaluations of different scenarios are presented.

关键词： 6doF audio immersive audio array calibration audio recording spherical microphone arrays

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immersive Venice - A Thousand Echoes

Immersive Venice - A Thousand Echoes

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immersive and 3d audio: from architecture to automotive (i3da)

作者： Giulia Vismara Cobi van Tonder Angela McArthur MaxLAb Research Group Royal Academy and Conservatory Anvers Belgium Dept of Architecture University of Bologna Italy Dept. of Anthropology University College London London UK

The soundscapes of Venice are as fascinating as its architectural wonders, rich history, impressive art and vibrant contemporary life. The timeless essence of the city, carved in marble over the millennia, appears firm and fluid, echoing the ebb of the tides. Venice is a city engaged in an incessant dialogue with its past, bridging the gap between the ephemeral and the lasting. Following the technique of auralization, we embark on a journey to explore the echoes of Venice, capturing its acoustic footprints and the existing and imaginary immersive sound. We venture into the quiet nights of the city, recording impulse responses from unusual viewpoints capturing different moments in time and space. Our collection includes field recordings that include the rhythmic cadence of thousands of steps, the daily buzz of voices on the streets, and the gentle caress of water against boats, docks, and seabeds, all contributing to the unique acoustics of the city. Through our artistic practice, we challenge the notion of objectivity in scientific research. We intersect our subjective sound practices with a scientific approach using technological means that respond to a specific space definition. Living a notion of space as physical and sensory and a notion of time as layered and non-linear, we agree on all these elements to present an exploration enriched by the auditory landscape of Venice. This material that reveals the deep connection between this extraordinary city's sound and essence will nourish three compositions and an acoustic mapping. This article presents meta-perspectives that consider paradigms of objectivity/ subjectivity and the importance of recognizing multiple perspectives when working with acoustic and sonic footprints of places.

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AdM-OSC: an industry initiative for communicating object-based audio data

ADM-OSC: an industry initiative for communicating object-bas...

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immersive and 3d audio: from architecture to automotive (i3da)

作者： Michael Zbyszyński Hervé déjardin david Marston Guillaume Le Nost Creative Software L-Acoustics London UK Audio Innovation Department Radio France Paris France Research & Development BBC London UK

Spatial and immersive audio has become increasingly mainstream, presented in concert halls and more recently (e.g. Apple: June 2021) through music streaming services. There is a diverse ecosystem of hardware and software controllers and renderers in both live and studio settings that would benefit from a standardized communication protocol. Since 2021 a growing group of industry stakeholders has been working to develop AdM-OSC to fill this need. AdM-OSC proposes a standard for transmitting position data for object-based audio by implementing a namespace in parallel with the audio definition Model (AdM), a metadata standard developed in the broadcast industry. Open Sound Control (OSC) is a well-established data transport protocol developed for flexible and accurate communication of real-time performance data. By leveraging these open standards, we have created a lightweight specification that can be easily implemented in audio software, plugins, game engines, consoles, and *** paper will discuss the design principals of AdM-OSC, developed to meet the needs of specific stakeholders and use cases. The core address space for position data is described, including a solution for representing both physics-based and cinematic distance. Proposed extensions to the next version of the specification will add comprehensive support for additional broadcast use cases, including different types of audio content (e.g., different languages or assistive descriptions), user interactivity, and cues for reducing channel count. We conclude with an overview of future AdM-OSC development, including next steps in bringing together ideas and discussion from multiple industry partners.

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