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                            Library & Multimedia
 Recording anechoic gunshot waveforms of several firearms at 500 kilohertz sampling rate
NCJ Number
              307034

Author(s)
          Tushar K. Routh;
                        Robert C. Maher,
Date Published

2016
Annotation
              This article presents research into acoustic analysis of gunshots from various firearms.
Abstract
              Acoustic gunshot signals consist of a high amplitude and short duration impulsive sound known as the muzzle blast and the shock wave. This experiment involved documenting gunshot muzzle blast sounds produced by eight commonly used firearms including Remington 870, Colt 45, Glock 19 with 9mm ammunition, Glock 23, Sig 239, AR15, 22LR, and Ruger SP 101 with 357 magnum and 38 special ammunition. An elevated microphone bracket (3m above the ground) was built to achieve a quasianechoic environment for the duration of the muzzle blast. Twelve microphones (GRAS 40DP) were mounted on the bracket in a semi-circular arc to observe the azimuthal variation of the muzzle blast. Signals were recorded using LabVIEW. Similarities and differences among waveforms are presented. (Published Abstract Provided)
      
  
          Additional Details
Grant Number(s)
        2014-DN-BX-K034


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)


  
  
        
  Award
        Advancing audio forensics of gunshot acoustics.
    
  
  
Date Published: January 1, 2016
    
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