TY - GEN
T1 - A spherical array approach for simulation of binaural impulse responses using the finite difference time domain method
AU - Sheaffer, Jonathan
AU - Van Walstijn, Maarten
AU - Rafaely, Boaz
AU - Kowalczyk, Konrad
PY - 2014/1/1
Y1 - 2014/1/1
N2 - The finite difference time domain (FDTD) method has direct applications in musical instrument modeling, simulation of environmental acoustics, room acoustics and sound reproduction paradigms, all of which benefit from auralization. However, rendering binaural impulse responses from simulated data is not straightforward to accomplish as the calculated pressure at FDTD grid nodes does not contain any directional information. This paper addresses this issue by introducing a spherical array to capture sound pressure on a finite difference grid, and decomposing it into a plane-wave density function. Binaural impulse responses are then constructed in the spherical harmonics domain by combining the decomposed grid data with free field head-related transfer functions. The effects of designing a spherical array in a Cartesian grid are studied, and emphasis is given to the relationships between array sampling and the spatial and spectral design parameters of several finite-difference schemes.
AB - The finite difference time domain (FDTD) method has direct applications in musical instrument modeling, simulation of environmental acoustics, room acoustics and sound reproduction paradigms, all of which benefit from auralization. However, rendering binaural impulse responses from simulated data is not straightforward to accomplish as the calculated pressure at FDTD grid nodes does not contain any directional information. This paper addresses this issue by introducing a spherical array to capture sound pressure on a finite difference grid, and decomposing it into a plane-wave density function. Binaural impulse responses are then constructed in the spherical harmonics domain by combining the decomposed grid data with free field head-related transfer functions. The effects of designing a spherical array in a Cartesian grid are studied, and emphasis is given to the relationships between array sampling and the spatial and spectral design parameters of several finite-difference schemes.
UR - http://www.scopus.com/inward/record.url?scp=84953326127&partnerID=8YFLogxK
M3 - Conference contribution
T3 - Proceedings of Forum Acusticum
BT - Forum Acusticum, FA 2014
A2 - Borkowski, Bartlomiej
T2 - 7th Forum Acusticum, FA 2014
Y2 - 7 September 2014 through 12 September 2014
ER -