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Figure 1 :Examples of impulse waveforms from firearms. Recordings were made at the shooter-field microphone location. In contrast to the firecracker impulses, the durations of firearm impulses are considerably longer and more complex, often including a secondary peak (e.g., the 12 gauge shotgun and .22 caliber rifle). A +10 dB scaling factor was applied to the .22 caliber rifle waveform to facilitate visualization. See Tables 1-4 for summaries of acoustic characteristics of the waveforms and estimates of auditory risk

Figure 1 :Examples of impulse waveforms from firearms. Recordings were made at the shooter-field microphone location. In contrast to the firecracker impulses, the durations of firearm impulses are considerably longer and more complex, often including a secondary peak (e.g., the 12 gauge shotgun and .22 caliber rifle). A +10 dB scaling factor was applied to the .22 caliber rifle waveform to facilitate visualization. See Tables 1-4 for summaries of acoustic characteristics of the waveforms and estimates of auditory risk