Collaborative Research: Immersive Audio-visualization of Seismic Wave Fields in the Earth (EarthScope Education & Outreach)

该项目的核心是开发一种方法(软件和硬件)，以产生地球上地震波场的同步视觉和声波表示。结合这些感官使人们，从普通大众到经验丰富的地震学家，能够欣赏和感知地震波场模式的巨大丰富性。其目的不是模拟地震的体验，而是将波在地球上传播的物理和地震物理的本质变成一种完全触觉的体验，不同于任何人所感知的任何东西。该工作组由来自拉蒙特·多尔蒂地球天文台(LDEO)、普林斯顿大学和美国自然历史博物馆(AMNH)的地球科学家、天体物理学家、声音和图形工程师以及教育工作者组成。图像和声音都是从US阵和GSN的数据中产生的，以及使用SPECFEM3D软件通过谱元素法(SEM)产生的模拟。声音是通过将地震信号的频率移入人的听觉范围而产生的，并在时间上进行过滤和拉伸，以优化视觉和声音的耦合效果。一旦方法到位，它将采取两种一般形式：第一，一种基于网络的格式，允许人们选择要收听的地震和地震数据，使用密集的地震仪阵列(即可移动阵列数据的IRIS产生的地面运动可视化(GMV))或地震波场模拟(即SPECFEM3D)产生的图像。这种格式将用于课堂和实验室目的，以及互动博物馆展品，以及地震学家对原始数据的探索性观察。第二，将为纽约美国自然历史博物馆的海登天文馆开发一个版本。这些投影在天文馆圆顶上的图像将包括以薄膜形式呈现的地球表面，以及观察者将看到3D波前在整个地球传播的体积渲染。声音将被调到天文馆的大型扬声器阵列上。在这个项目的背景下，天文馆将有几个公共项目，其中聆听地球的身临其境的体验将由制作团队指导。这些公共项目是在AMNH上开发关于地球动力学的完整天文馆展示的必要的第一步。

The core of this project is the development of a methodology (softwareand hardware) to produce synchronized visual and sonic representationsof seismic wave fields in the Earth. Coupling these senses enablespeople, from the general public to seasoned seismologists, toappreciate and perceive an enormous richness in the patterns ofseismic wave fields. The aim is not to simulate the experience of anearthquake, but to render the physics of wave propagation in the globeand the nature of earthquake physics into a completely tactileexperience, unlike anything anyone has ever perceived. The workinggroup is comprised of earth scientists, astrophysicists, sound andgraphics engineers and educators, from the Lamont Doherty EarthObservatory (LDEO), Princeton University, and the American Museum ofNatural History (AMNH).The images and sounds are generated from both USArray and GSN data, aswell as from simulations generated with the spectral element method(SEM), using the SPECFEM3D software. Sounds are generated by shiftingthe frequency of the seismic signal into the range of human hearing,and are filtered and stretched in time to optimize the coupled visualand sonic effects. Once the methodology is in place, it will take twogeneral forms:First, a web-based format that allows people to choose earthquakes andseismic data to listen to, with images produced by either a densearray of seismometers (i.e. the ground motion visualizations (GMVs)produced by IRIS of the Transportable Array data) or a simulation ofthe seismic wave field (i.e. by SPECFEM3D). This format will be usefulfor classroom and laboratory purposes, and interactive museumexhibits, as well as for exploratory observation of raw data byseismologists.Second, a version will be developed for the Hayden Planetarium at theAmerican Museum of Natural History, in New York City. The images,projected on the planetarium dome, will include the surface of theEarth rendered as a membrane and also a volumetric rendering in whichthe observer will see 3D wave fronts propagating throughout the globe.The sounds will be tuned to the large speaker array in thePlanetarium. Within the context of this project, several PublicPrograms will occur in the Planetarium, in which the immersiveexperience of listening to the Earth will be guided by the productionteam. These Public Programs are the essential first step towardsdeveloping a full planetarium show on the dynamics of the Earth atAMNH.