title: An improved method to determine the onset timings of reflections in an acoustic impulse response.
abstract: Determining the absolute onset time of reflections in an acoustic impulse response (IR) has applications for both subjective and physical acoustics problems. Although computationally simple, a first-order energetic analysis of the IR can lead to false-positive identification of reflections. This letter reports on a method to determine reflection onset timings using a modified running local kurtosis analysis to identify regions in the IR where the distribution is non-normal. IRs from both real and virtual rooms are used to validate the method and to find optimum analysis window sizes.
authors.affiliation: Barcelona Media - Innovation Centre, Avenida Diagonal 177, 08018 Barcelona, Spain. john.usher@barcelonamedia.org
authors.forename: John
authors.initials: J
authors.lastname: Usher
mesh_terms: D000162:Acoustics; D003198:Computer Simulation; D005160:Facility Design and Construction; D008962:Models, Theoretical; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors