Hearing Conservation for Sinking Workshops
下凹工坊的噪声听力保护方案
标签：听力保护, 噪声, 职业健康, 降噪
下凹与压窝的锤击属宽频冲击噪声，单次峰值可达 110–120 dB(C)，防护要点：①每人配 SNR ≥27 dB 的耳塞，长时间作业加戴耳罩构成双防护；②工作砧与台面间垫聚氨酯减振垫、坑砳内填沙，可将峰值降 5–8 dB；③日等效暴露超 85 dB(A) 时用噪声剂量计抽测并安排轮岗。新人入职先做纯音听力基线，之后每年复测对比；噪声区张贴警示标识，参观者同样必须佩戴护具，这也是多数工作室保险条款的要求。
Sinking and dapping blows are broadband impulse noise with peaks of 110–120 dB(C). Protect with: earplugs of SNR 27 or better per person, plus muffs for long sessions as double protection; a polyurethane pad between stake and bench and sand-packed pit forms to shave 5–8 dB off the peaks; and dosimeter spot checks with task rotation once the daily Leq passes 85 dB(A). Baseline every new worker with pure-tone audiometry and re-test yearly. Post warning signage—visitors wear protection too, as most studio insurance policies require.