Name
Title | ||
|---|---|---|
Identification of surface acoustic impedances in a reverberant room using the FDTD method |
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. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/IWAENC.2014.6953349 | Acoustic Signal Enhancement |
Keywords | Field | DocType |
absorption coefficients,acoustic impedance,architectural acoustics,finite difference time-domain analysis,frequency-domain analysis,numerical analysis,optimisation,reverberation chambers,surface acoustic waves,FDTD method,absorption coefficients,finite difference time domain method,frequency octave band,frequency-domain method,nonlinear optimization,numerical method,numerical model,numerical room acoustic simulations,reverberant room,reverberation chambers,sound field,surface acoustic impedances,Acoustic impedance,finite difference time domain (FDTD),in-situ measurement,inverse acoustics,nonlinear optimization,room acoustics | Acoustic impedance,Reverberation,Acoustic wave equation,Nonlinear programming,Electrical impedance,Finite-difference time-domain method,Acoustics,Numerical analysis,Acoustic source localization,Physics | Conference |
Citations | PageRank | References |
1 | 0.35 | 4 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Niccolo Antonello | 1 | 17 | 2.12 |
| Toon van Waterschoot | 2 | 157 | 14.29 |
| Marc Moonen | 3 | 3673 | 326.91 |
| Patrick A. Naylor | 4 | 1023 | 117.31 |