NDLI: Identification of surface acoustic impedances in a reverberant room using the FDTD method

Content Provider	IEEE Xplore Digital Library
Author	Antonello, N. van Waterschoot, T. Moonen, M. Naylor, P.A.
Copyright Year	2014
Description	Author affiliation: Dept. of Electr. Eng., KU Leuven, Leuven, Belgium (Antonello, N.; van Waterschoot, T.; Moonen, M.) \|\| Dept. of Electr. Eng., Imperial Coll. London, London, UK (Naylor, P.A.)
Abstract	In numerical room acoustic simulations the acoustic impedance of walls and boundaries is of fundamental importance for the correct physical and perceptual synthesis of a sound field. Acoustic impedances are usually measured in reverberation chambers as absorption coefficients. In this type of measurements the sound field is assumed to be diffuse, which is an ideal condition usually not met in real rooms. This paper proposes a different approach to obtain the acoustic impedances, where a numerical model of the room is tuned with measurements using nonlinear optimization. The finite difference time domain (FDTD) method is used to simulate a sound field of a room and an optimization problem is solved to recover the acoustic impedances per frequency octave band. Results show that the use of a time-domain numerical method is advantageous as compared to a frequency-domain method, by making the measurement set-up more practical and improving the optimization convergence.
Starting Page	114
Ending Page	118
File Size	449278
Page Count	5
File Format	PDF
ISBN	9781479968084
DOI	10.1109/IWAENC.2014.6953349
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-08
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nonlinear optimization Acoustics Time-domain analysis Optimization Microphones Acoustic impedance In-situ measurement Inverse acoustics Acoustic measurements Impedance Room acoustics Finite difference methods Finite difference time domain (FDTD)
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Wideband and Isotropic Room Acoustics Simulation Using 2-D Interpolated FDTD Schemes

Room Acoustics Simulation Using 3-D Compact Explicit FDTD Schemes

Source localization and signal reconstruction in a reverberant field using the FDTD method

A Phase Grating Approach to Modeling Surface Diffusion in FDTD Room Acoustics Simulations

Virtual room acoustics using finite difference methods. How to model and analyse frequency-dependent boundaries?

Modeling broadband acoustic scattering of underwater elastic object using Finite-Difference Time-Domain (FDTD) method

Finite-difference time domain method source calibration for hybrid acoustics modeling

Spatial Encoding of Finite Difference Time Domain Acoustic Models for Auralization

Optimized FDTD Schemes for 3-D Acoustic Wave Propagation

Identification of surface acoustic impedances in a reverberant room using the FDTD method

Similar Documents

Wideband and Isotropic Room Acoustics Simulation Using 2-D Interpolated FDTD Schemes

Room Acoustics Simulation Using 3-D Compact Explicit FDTD Schemes

Source localization and signal reconstruction in a reverberant field using the FDTD method

A Phase Grating Approach to Modeling Surface Diffusion in FDTD Room Acoustics Simulations

Virtual room acoustics using finite difference methods. How to model and analyse frequency-dependent boundaries?

Modeling broadband acoustic scattering of underwater elastic object using Finite-Difference Time-Domain (FDTD) method

Finite-difference time domain method source calibration for hybrid acoustics modeling

Spatial Encoding of Finite Difference Time Domain Acoustic Models for Auralization

Optimized FDTD Schemes for 3-D Acoustic Wave Propagation

Identification of surface acoustic impedances in a reverberant room using the FDTD method