Hearing Protection and Ergonomics for Chasing Work
锤击錾刻的听力保护与人机工学
标签：听力保护, 重复劳损, 人机工学, 职业健康
小锤高频錾击 8 h 等效声级常达 85–95 dB(A)，日接触超 80 dB(A) 就应佩戴 SNR 25 以上耳塞，长时间作业加戴耳罩；每天锤击累计超 2 h 建议与锉磨、胶盘调整等工序轮换。胶盘顶面调至坐姿肘部略低，前臂自然下垂、肘角 90–110°，锤柄虚握可显著降低腕部重复劳损（RSI）风险；每 50 min 休息 5–10 min 做手指与前臂拉伸。职业錾刻者建议入职做纯音听力测听建立基线，此后每年复测。
High-frequency small-hammer chasing typically runs an 8-h equivalent level of 85–95 dB(A): above 80 dB(A) wear earplugs of SNR 25 or better, adding muffs for long sessions, and rotate into filing or pitch-bowl work once hammering tops 2 h a day. Set the pitch bowl just below seated elbow height, forearm hanging with a 90–110° elbow angle, holding the handle lightly—this markedly cuts wrist RSI risk. Break 5–10 min every 50 min for finger and forearm stretches. Professional chasers should baseline their hearing on hiring and re-test yearly.