In line with other studies, our data document a high degree of trauma exposure during warchildhood. In comparison with other studies on PTSD in warchildren, there is a persisting high prevalence of war-associated PTSD symptoms in this sample. Despite some methodological limitations, our data underline the urgent need for further studies on the ageing group of former children of World War II.
The coupled-volume concert hall and its signature double-sloped sound decay attempt to reconcile the often-competing qualities of clarity and reverberance. By wrapping a room with another more reverberant room, and allowing for apertures to control the sonic transparency between the two rooms, designers use coupling to provide a sound field that is variable, longer, distinct, and performance-piece-specific. For this study a coupled-volume concert hall (based on an existing hall) is conceived with a fixed geometric volume, form, and materiality. Aperture size is established as variable. The simulated hall undergoes statistical and geometric (ray tracing software) analysis. Results show disparity in the absolute decay patterns projected by the two methods; however, both statistical and geometric relative analyses suggest a highly sensitive relationship between the aperture size exposing the coupled-volume and the double-sloped condition. To test the model, simulations are compared to real-room measurements taken in a coupled volume concert hall. I. INTRODUCTION: Researchers have established an inverse relationship between the important acoustical qualities of clarity and reverberance. 1,2 Once considered anathema to quality acoustics, 3 the double-sloped sound decay has recently received attention as a possible method of simultaneously achieving clarity with reverberance in concert halls. By allowing a musical note to decay rapidly at first, each successive note may be perceived as a *Expansion of: Ermann, M., Johnson, M., and Harrison, B., "Aperture size, materiality of the secondary room and listener location: Impact on the simulated impulse response of a coupled-volume concert hall," (From the 145 th meeting of the ASA, Nashville).
Novel discoveries, non-obvious findings, and counter-intuitive conclusions will be excerpted and highlighted from the just-released book Architectural Acoustics Illustrated (authored by the presenter, Wiley, 2015). The text filters the content of architectural acoustics through the graphic and built language of architecture. In writing the book, building material choices, spatial relationships, best-practices, and data were explored through drawing and animated videos. Summaries of the findings will be demonstrated graphically to establish relationships in sound absorption, room acoustics, sound isolation, and noise control.
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