Scholars@Duke
Steven A. Cummer

Steven A. Cummer

William H. Younger Distinguished Professor of Engineering
Pierre R. Lamond Department of Electrical and Computer Engineering
cummer@duke.edu
Box 90291, Durham, NC 27708-0291
3455 CIEMAS, Durham, NC 27708

Featured Works

Data from: Indirectly measured ambient electric fields for lightning initiation in fast breakdown regions

Dataset · January 8, 2020 Featured Work We report a new approach to measure indirectly the ambient thunderstorm electric fields in fast positive breakdown regions. For a given geometry of the discharged fast breakdown region, we show that there is a minimum ambient electric field required to pro ... Full text Cite

Single-sensor multispeaker listening with acoustic metamaterials.

Journal article Proceedings of the National Academy of Sciences of the United States of America · August 2015 Featured Work Designing a "cocktail party listener" that functionally mimics the selective perception of a human auditory system has been pursued over the past decades. By exploiting acoustic metamaterials and compressive sensing, we present here a single-sensor listeni ... Full text Cite

Implications of lightning emissions for terrestrial gamma-ray flashes and associated lightning discharges

Conference 2014 International Conference on Lightning Protection Iclp 2014 · December 3, 2014 Featured Work Remote sensing of broadband (<1 Hz to 300 kHz) lightning signals related to terrestrial gamma-ray flashes (TGFs) indicates that gamma-rays in TGFs are typically produced during a slow process that creates a considerable charge moment change within a few mi ... Full text Cite

Three-dimensional broadband omnidirectional acoustic ground cloak.

Journal article Nature materials · April 2014 Featured Work The control of sound propagation and reflection has always been the goal of engineers involved in the design of acoustic systems. A recent design approach based on coordinate transformations, which is applicable to many physical systems, together with the ... Full text Open Access Cite

Applied physics. Selecting the direction of sound transmission.

Journal article Science (New York, N.Y.) · January 2014 Featured Work Full text Cite