Ambisonic Amplitude Panning and Decoding in Higher Orders

Zotter, Franz; Frank, Matthias

doi:10.1007/978-3-030-17207-7_4

Cited by 14 publications

(19 citation statements)

References 16 publications

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“…In case of irregular arrangements of loudspeakers this is not possible. In this study, we compared Ambisonics mode matching method via a Moore-Penrose pseudoinverse and the All-Round Ambisonic decoding (AllRAD) from [19]. Both methods were implemented in C++, and shown to achieve numerically identical results as the MATLAB implementation in the Ambisonics Decoder Toolbox [20,21].…”

Section: Higher Order Ambisonicsmentioning

confidence: 99%

Comparison of 2D and 3D multichannel audio rendering methods for hearing research applications using technical and perceptual measures

Gerken,

Hohmann,

Grimm

2024

Acta Acust.

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Virtual reality with multichannel audio playback is increasingly used in hearing aid research. The purpose of this study is to compare horizontal (2D) and periphonic (3D) rendering methods in terms of localization, minimum audible angle, and perceptual ratings related to spatial quality. Higher Order Ambisonics, Vector-Base Amplitude Panning, and Nearest Speaker Selection were used, with playback through 16, 29 and 45 speakers. The results show that an improvement in vertical localization can be obtained by using periphonic rendering instead of horizontal rendering. The perceptual advantage of periphonic rendering depends on the spatial complexity of the scene; it disappears in complex acoustic environments. Scenes with low acoustic complexity, such as a single primary sound source in a room, benefit from Nearest Speaker Selection rendering. For more complex scenes with multiple sound sources, such as a symphony orchestra in a concert hall with many primary sources, or traffic on a road with moving sources, horizontal rendering methods such as 2D Higher Order Ambisonics will provide similar or better performance.

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Section: Higher Order Ambisonicsmentioning

confidence: 99%

Comparison of 2D and 3D multichannel audio rendering methods for hearing research applications using technical and perceptual measures

Gerken,

Hohmann,

Grimm

2024

Acta Acust.

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“…19,20 The decoder uses phasematched shelf filters to cross over from basic decoding to max-rE decoding at 400 Hz, which reduces side lobes and improves the spatial perception at high frequencies. 21 In addition, the decoder includes time delay compensation and a magnitude correction to account for the distance from each loudspeaker to the center of the array, and order-dependent high-pass filters for near field compensation. 22 (a) (b) Figure 3: A picture of the AURAS loudspeaker array (a) and the distribution of the loudspeakers (b).…”

Section: Ambisonics Reproduction For the Subjective Studymentioning

confidence: 99%

Investigation of Listener Envelopment and the Late Sound Field Using Spherical Microphone Array Impulse Response Measurements

DICK,

VIGEANT

2023

Auditorium Acoustics 2015

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“…SRD ARIR and ideal 3rd-order directivity (Si): While the Room Transfer Function is represented by a SRD ARIR as well (same as for Sr), the source Directivity is assumed to be an ideal 3rd-order directivity instead of the real IKO, here. Thus, the directivity is synthesized by multiplying the encoded signals with a frequency-independent diagonal matrix containing the max-r E weights [44,45] up to order N B .…”

Section: Ambisonics Encoding Renderingmentioning

confidence: 99%

Auralization of High-Order Directional Sources from First-Order RIR Measurements

2020

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Can auralization of a highly directional source in a room succeed if it employs a room impulse response (RIR) measurement or simulation relying on a first-order directional source, only? This contribution presents model and evaluation of a source-and-receiver-directional Ambisonics RIR capture and processing approach (SRD ARIR) based on a small set of responses from a first-order source to a first-order receiver. To enhance the directional resolution, we extend the Ambisonic spatial decomposition method (ASDM) to upscale the first-order resolution of both source and receiver to higher orders. To evaluate the method, a listening experiment was conducted based on first-order SRD-ARIR measurements, into which the higher-order directivity of icosahedral loudspeaker’s (IKO) was inserted as directional source of well-studied perceptual effects. The results show how the proposed method performs and compares to alternative rendering methods based on measurements taken in the same acoustic environment, e.g., multiple-orientation binaural room impulse responses (MOBRIRs) from the physical IKO to the KU-100 dummy head, or higher-order SRD ARIRs from IKO to em32 Eigenmike. For optimal externalization, our experiments exploit the benefits of virtual reality, using a highly realistic visualization on head-mounted-display, and a user interface to report localization by placing interactive visual objects in the virtual space.

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Ambisonic Amplitude Panning and Decoding in Higher Orders

Abstract: …the second-order Ambisonic system offers improved imaging over a wider area than the first-order system and is suitable for larger rooms.

Cited by 14 publications

References 16 publications

Comparison of 2D and 3D multichannel audio rendering methods for hearing research applications using technical and perceptual measures

Comparison of 2D and 3D multichannel audio rendering methods for hearing research applications using technical and perceptual measures

Investigation of Listener Envelopment and the Late Sound Field Using Spherical Microphone Array Impulse Response Measurements

Auralization of High-Order Directional Sources from First-Order RIR Measurements

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