Corpus ID: 236428727

Adding air attenuation to simulated room impulse responses: A modal approach

  title={Adding air attenuation to simulated room impulse responses: A modal approach},
  author={Brian Hamilton},
  • B. Hamilton
  • Published 2021
  • Mathematics, Computer Science, Engineering
  • ArXiv
Air absorption is an important effect to consider when simulating room acoustics as it leads to significant attenuation in high frequencies. In this study, an offline method for adding air absorption to simulated room impulse responses is devised. The proposed method is based on a modal scheme for a system of one-dimensional dissipative wave equations, which can be used to post-process a room impulse response simulated without air absorption, thereby incorporating missing frequencydependent… Expand

Figures from this paper


Adding air absorption to simulated room acoustic models.
  • J. Kates, E. Brandewie
  • Medicine, Materials Science
  • The Journal of the Acoustical Society of America
  • 2020
This letter proposes a method for adding air absorption to a simulated room impulse response calculated without air absorption, which creates a time-varying lowpass filter that approximates air absorption as a function of distance. Expand
Modeling of reflections and air absorption in acoustical spaces a digital filter design approach
A method is presented for modeling sound propagation in rooms using a signal processing approach. Low order digital filters are designed to match to sound propagation transfer functions calculatedExpand
Room Impulse Response Synthesis and Validation Using a Hybrid Acoustic Model
Consideration is given to how such RIRs can be matched across modeling domains in terms of both amplitude and boundary behavior and the approach is verified using a number of standardised case studies. Expand
Image method for efficiently simulating small‐room acoustics
The theoretical and practical use of image techniques for simulating the impulse response between two points in a small rectangular room, when convolved with any desired input signal, simulates room reverberation of the input signal. Expand
On the Modeling of Rectangular Geometries in Room Acoustic Simulations
It is shown that sweeping echoes are present (although to greatly varying degrees) in all perfectly rectangular rooms, and small out-of-square asymmetries in the room geometry are shown to reduce the phenomenon significantly. Expand
Numerical simulation of finite amplitude wave propagation in air using a realistic atmospheric absorption modela)
A nonlinear system of fluid dynamic equations is modeled that accounts for the effects of classical absorption, nitrogen and oxygen molecular relaxation, and relative humidity. Total variables ratherExpand
Finite Difference Room Acoustics Simulation with General Impedance Boundaries and Viscothermal Losses in Air: Parallel Implementation on Multiple GPUs
Room acoustics modelling requires numerical methods that can simulate the wave behaviour of sound across a wide band of frequencies while taking into account the frequency-dependent characteristicsExpand
Physical and numerical constraints in source modeling for finite difference simulation of room acoustics.
This paper addresses the issue of selecting and designing sources for finite difference simulation, by first reviewing associated aims and constraints, and evaluating existing source models against these criteria. Expand
Extension of a spectral time-stepping domain decomposition method for dispersive and dissipative wave propagation.
This letter presents an extension of a spectral domain decomposition approach, previously used to solve the lossless linear wave equation, which accommodates frequency-dependent atmospheric attenuation and assignment of arbitrary dispersion relations. Expand
Directional Sources in Wave-Based Acoustic Simulation
  • S. Bilbao, B. Hamilton
  • Physics, Computer Science
  • IEEE/ACM Transactions on Audio, Speech, and Language Processing
  • 2019
A new model of point sources of arbitrary directivity and location with respect to an underlying grid is presented, framed in the spatio-temporal domain directly through the differentiation of Dirac distributions, leading to a spatial Fourier-based approximation strategy. Expand