Room acoustics
Reflections and ray acoustics
‐ray vs. wave based analyses: reflections and modal analysis
‐clear reflections from large flat surfaces ⇒ suitable for open air simple geometries and rectangular spaces
Room modes and modal analysis
‐room modes: irregular room shapes even these out—they do not disappear but attain a statistical evened out quality
‐rectangular rooms are very bad
‐psychoacoustics of rapidly fluctuating system functions vs. comb responses
Diffraction, dispersion and reverberation
‐(Speech) intelligibility
‐Moorer statistical analysis for large spaces
‐modal analysis for smaller spaces
‐surface detail disperses strongly (book shelves!)
‐sufficient detail makes wave effects dominate ⇒ combinatorial explosion of room modes ⇒ justifies statistical approaches
Absorption and acoustical treatment
‐surface detail and soft surfaces absorb high to mid frequencies
‐bass is difficult to absorb ⇒ bass traps
‐link to room correction part?
Near‐field acoustics
‐near‐field effects
‐reactive sound fields