据美刊《钢琴技师》一九七八年十一月号报导,美国职业安全与健康管理局(OSHA)测试表明:人们在声级为90分贝的环境中呆八小时,听觉会受到损害;在92分贝的环境中呆六小时,会造成永久性的听力丧失;但在95分贝环境中不超过四小时还是安全的。进一步的测试证明,调音时,距音板12吋的空 According to a report by the Piano Technician in November 1978, the OSHA test showed that hearing impaired people for eight hours when they were in the 90 dB sound level. Staying in a 92 dB environment for six hours can result in permanent hearing loss; however, it is safe to stay in a 95 dB environment for no more than four hours. Further tests show that when tuning, 12 inches away from the soundboard empty