Using spherical array receivers to extract scattering coefficients of room surfaces

Dingding Xie; Maarten C.J. Hornikx

doi:10.61782/fa.2025.0945

Using spherical array receivers to extract scattering coefficients of room surfaces

Dingding Xie (Corresponding author)
, Maarten C.J. Hornikx

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

2 Downloads (Pure)

Abstract

Scattering coefficients (SCs) are crucial for modeling room sound fields in rooms. Due to the lack of SCs on many practical surfaces and room objects, this study aims to derive a relation between surface SCs and the angulardependent
SCs obtained by a spherical receiver array in the room. The work is based on a computational approach. The sound field at a spherical receiver array is computed for a room with and without surface scattering at the room
boundaries. A hybrid model of the Image Source Model and the Radiosity Model is used for this purpose. The sound field on the spherical receiver is then decomposed into plane waves, leading to ambisonic impulse responses
(IRs). Then, the angular-dependent SCs are derived from these ambisonic IRs in both scenarios with a coherence method. Results show that angular-dependent SCs vary significantly depending on the apparent area of scattering
surfaces as seen from the receiver, and a qualitative relationship between surface SCs and angular-dependent SCs is observed. This approach offers a promising framework for quantifying the scattering properties of room boundaries
based on spherical array receivers.

Original language	English
Title of host publication	Proceedings of the 11th Convention of the European Acoustics Association, Forum Acusticum / EuroNoise 2025
Editors	Daniel de la Prida, Jaime Ramis, María Machimbarrena
Publisher	European Acoustics Association, EAA
Pages	4179-4184
Number of pages	6
ISBN (Electronic)	978-84-87985-35-5
DOIs	https://doi.org/10.61782/fa.2025.0945
Publication status	Published - 2025
Event	11th EAA Annual European Conference on Acoustics and Noise Control Engineering, Forum Acusticum / Euronoise 2025 - Málaga, Spain Duration: 23 Jun 2025 → 26 Jun 2025

Conference

Conference	11th EAA Annual European Conference on Acoustics and Noise Control Engineering, Forum Acusticum / Euronoise 2025
Country/Territory	Spain
City	Málaga
Period	23/06/25 → 26/06/25

Access to Document

10.61782/fa.2025.0945

Xie2025C1Final author version , 4.67 MB
pdfFinal published version, 4.69 MBLicence: CC BY

Cite this

Xie, D., & Hornikx, M. C. J. (2025). Using spherical array receivers to extract scattering coefficients of room surfaces. In D. de la Prida, J. Ramis, & M. Machimbarrena (Eds.), Proceedings of the 11th Convention of the European Acoustics Association, Forum Acusticum / EuroNoise 2025 (pp. 4179-4184). European Acoustics Association, EAA. https://doi.org/10.61782/fa.2025.0945

@inproceedings{bd42152b4de441068e5c73b2e11ee3fb,

title = "Using spherical array receivers to extract scattering coefficients of room surfaces",

abstract = "Scattering coefficients (SCs) are crucial for modeling room sound fields in rooms. Due to the lack of SCs on many practical surfaces and room objects, this study aims to derive a relation between surface SCs and the angulardependent SCs obtained by a spherical receiver array in the room. The work is based on a computational approach. The sound field at a spherical receiver array is computed for a room with and without surface scattering at the room boundaries. A hybrid model of the Image Source Model and the Radiosity Model is used for this purpose. The sound field on the spherical receiver is then decomposed into plane waves, leading to ambisonic impulse responses (IRs). Then, the angular-dependent SCs are derived from these ambisonic IRs in both scenarios with a coherence method. Results show that angular-dependent SCs vary significantly depending on the apparent area of scattering surfaces as seen from the receiver, and a qualitative relationship between surface SCs and angular-dependent SCs is observed. This approach offers a promising framework for quantifying the scattering properties of room boundaries based on spherical array receivers.",

author = "Dingding Xie and Hornikx, \{Maarten C.J.\}",

year = "2025",

doi = "10.61782/fa.2025.0945",

language = "English",

pages = "4179--4184",

editor = "\{de la Prida\}, Daniel and Jaime Ramis and Mar{\'i}a Machimbarrena",

booktitle = "Proceedings of the 11th Convention of the European Acoustics Association, Forum Acusticum / EuroNoise 2025",

publisher = "European Acoustics Association, EAA",

address = "France",

note = "11th EAA Annual European Conference on Acoustics and Noise Control Engineering, Forum Acusticum / Euronoise 2025 ; Conference date: 23-06-2025 Through 26-06-2025",

}

Xie, D & Hornikx, MCJ 2025, Using spherical array receivers to extract scattering coefficients of room surfaces. in D de la Prida, J Ramis & M Machimbarrena (eds), Proceedings of the 11th Convention of the European Acoustics Association, Forum Acusticum / EuroNoise 2025. European Acoustics Association, EAA, pp. 4179-4184, 11th EAA Annual European Conference on Acoustics and Noise Control Engineering, Forum Acusticum / Euronoise 2025, Málaga, Spain, 23/06/25. https://doi.org/10.61782/fa.2025.0945

Using spherical array receivers to extract scattering coefficients of room surfaces. / Xie, Dingding (Corresponding author); Hornikx, Maarten C.J.
Proceedings of the 11th Convention of the European Acoustics Association, Forum Acusticum / EuroNoise 2025. ed. / Daniel de la Prida; Jaime Ramis; María Machimbarrena. European Acoustics Association, EAA, 2025. p. 4179-4184.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Using spherical array receivers to extract scattering coefficients of room surfaces

AU - Xie, Dingding

AU - Hornikx, Maarten C.J.

PY - 2025

Y1 - 2025

N2 - Scattering coefficients (SCs) are crucial for modeling room sound fields in rooms. Due to the lack of SCs on many practical surfaces and room objects, this study aims to derive a relation between surface SCs and the angulardependent SCs obtained by a spherical receiver array in the room. The work is based on a computational approach. The sound field at a spherical receiver array is computed for a room with and without surface scattering at the room boundaries. A hybrid model of the Image Source Model and the Radiosity Model is used for this purpose. The sound field on the spherical receiver is then decomposed into plane waves, leading to ambisonic impulse responses (IRs). Then, the angular-dependent SCs are derived from these ambisonic IRs in both scenarios with a coherence method. Results show that angular-dependent SCs vary significantly depending on the apparent area of scattering surfaces as seen from the receiver, and a qualitative relationship between surface SCs and angular-dependent SCs is observed. This approach offers a promising framework for quantifying the scattering properties of room boundaries based on spherical array receivers.

AB - Scattering coefficients (SCs) are crucial for modeling room sound fields in rooms. Due to the lack of SCs on many practical surfaces and room objects, this study aims to derive a relation between surface SCs and the angulardependent SCs obtained by a spherical receiver array in the room. The work is based on a computational approach. The sound field at a spherical receiver array is computed for a room with and without surface scattering at the room boundaries. A hybrid model of the Image Source Model and the Radiosity Model is used for this purpose. The sound field on the spherical receiver is then decomposed into plane waves, leading to ambisonic impulse responses (IRs). Then, the angular-dependent SCs are derived from these ambisonic IRs in both scenarios with a coherence method. Results show that angular-dependent SCs vary significantly depending on the apparent area of scattering surfaces as seen from the receiver, and a qualitative relationship between surface SCs and angular-dependent SCs is observed. This approach offers a promising framework for quantifying the scattering properties of room boundaries based on spherical array receivers.

U2 - 10.61782/fa.2025.0945

DO - 10.61782/fa.2025.0945

M3 - Conference contribution

SP - 4179

EP - 4184

BT - Proceedings of the 11th Convention of the European Acoustics Association, Forum Acusticum / EuroNoise 2025

A2 - de la Prida, Daniel

A2 - Ramis, Jaime

A2 - Machimbarrena, María

PB - European Acoustics Association, EAA

T2 - 11th EAA Annual European Conference on Acoustics and Noise Control Engineering, Forum Acusticum / Euronoise 2025

Y2 - 23 June 2025 through 26 June 2025

ER -

Using spherical array receivers to extract scattering coefficients of room surfaces

Abstract

Conference

Access to Document

Fingerprint

Cite this