title: A steered response power iterative method for high-accuracy acoustic source localization.
abstract: Source localization using the steered response power (SRP) usually requires a costly grid-search procedure. To address this issue, a modified SRP algorithm was recently introduced, providing improved robustness when using coarser spatial grids. In this letter, an iterative method based on the modified SRP is presented. A coarse spatial grid is initially evaluated with the modified SRP, selecting the point with the highest accumulated value. Then, its corresponding volume is iteratively decomposed by using a finer spatial grid. Experiments have shown that this method provides almost the same accuracy as the fine-grid search with a substantial reduction of functional evaluations.
authors.affiliation: iTEAM Institute, Universitat Politècnica de València, 46022, Valencia, Spain.
authors.forename: Amparo
authors.initials: A
authors.lastname: Marti
authors.forename: Maximo
authors.initials: M
authors.lastname: Cobos
authors.forename: Jose J
authors.initials: JJ
authors.lastname: Lopez
authors.forename: Jose
authors.initials: J
authors.lastname: Escolano
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D000465:Algorithms; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014159:Transducers