BYU

Abstract by Reese Rasband

Personal Infomation


Presenter's Name

Reese Rasband

Degree Level

Masters

Abstract Infomation


Department

Physics and Astronomy

Faculty Advisor

Kent Gee

Title

Developing extrapolated pressure level maps from firearms

Abstract

This paper describes development of spatial maps for both peak and A-weighted equivalent sound levels from various firearms, as measured with different spatial resolution. Two outdoor datasets that adhered to the MIL-STD-1474E weapons noise measurement standard are considered. First is an extensive measurement of the M16A4 rifle at U.S. Marine Corps Base Quantico that included several shooter configurations and a circular measurement arc with 15-degree spacing, 3.67 m radius [R.D. Rasband et al. J. Acoust. Soc. Am. 143, 1935 (2018)]. Second is a measurement of many different firearms using an array with 30-degree spacing and 3.0 m radius, performed in Rudyard Michigan [W.J. Murphy et al. J. Acoust. Soc. Am. 132, 1905 (2012)]. Using these levels and conservative estimates based on spherical spreading and symmetry, level maps are created based on shooter position, weapon used, and number of shots fired. The fidelity of the extrapolation procedure and possible future improvements are discussed. [Work supported by ONR, WTB Quantico, and AFRL through ORISE.]