Enlargement of perceived size of sound source using diffusive geometries
Ladda ner
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Sound and vibration (MPSOV), MSc
Publicerad
2024
Författare
Xu, Zhiwen
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Interaural cross correlation, which quantifies the similarity of binaural signals, is essential for
immersive and rendered auditory environment. Previous research has proven that reducing
interaural correlation leads to expansion of perceived size of a source. The Schroeder diffuser
is a prevalently used acoustic design to create pleasant acoustic environment since it was
firstly developed. It helps to eliminate many acoustic problems in many scenarios through
scattering waves in multiply directions. In this work, the Schroeder diffuser is employed to
manufacture natural sound field with reduced interaural correlation so that models of source
enlarger can be studied further.
To explore the properties of the sound field of the Schroeder diffuser, the produced sound
field is simulated and a method of representing the sound field with circular harmonic expansion is
applied. The characteristics of the sound field of the Schroeder diffuser are investigated to discover their
connectivity with low interaural correlation in order that any other arbitrary sound field can be
manipulated to achieve it. In light of such discovery, two models of simple sound fields which
are impulse field and plane wave field are utilized to produce the sound field with low interaural
correlation with proper modification engaged. These simple models are capable of saving
computational cost as simulating the Schroeder diffuser is pretty resource and time consuming.
Beskrivning
Ämne/nyckelord
Spatial Audio, Diffusive Geometry, Schroeder Diffuser, Circular Harmonic Ex pansion, Binaural Analysis, Digital Signal Process