防爆装备对 TNT 炸药爆炸强噪声的防护性能

High-level explosive noise (HLEN) is a non-lethal damage accompanying explosions, which can directly damage one’s auditory system. Using the mechanism analysis of the HLEN’s awareness and propagation, explosive noise tests with different TNT mass are conducted to study the sound pressure (p_sp), sound pressure level (p_spl), propagation laws of free air burst (FAB), flexible explosive proof (FEP), and steel explosive proof (SEP). The HLEN protection performances of FEP and SEP are compared with that of FAB. The results show that the HLEN has typical characteristics of low frequency and high p_sp & p_spl. At 20 m to 40 m from the explosion center, the peak p_sp attenuations are about 50%, 52%, 48%, and the peak p_spl attenuations are about 5.7%, 4.7%, and 4. 9% for FAB, FEP and SEP, respectively. The peak p_sp / p_spl travel time is equal, i. e., ∆t_FAB = ∆t_SEP = ∆t_FEP = 0.057 s.FEP can weaken the peak p_sp by 52% to 93.5% and reduce the peak p_spl by 4.8% to 9.1%. SEP can decrease the peak p_sp by 24.6% to 93% and reduce the peak p_spl by 1.4% to 6.9%. Human ear injuries are graded on a scale of I to IV. With FAB, the injury is mainly grade IV and III. With FEP, the injury is mainly grade III and grade III-II. With SEP, the injury is mostly grade IV-III and grade III.