div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: NOISE Brochure 3 2015 FIN - aubedulb · and silence research group sound is 50 100 - deci els 120-140+ dba avoid or use hearing protection 90-110 dba dangerous over 30 minutes src=https:reader031vdocumentinreader031viewer20220306095ad867117f8b9a3e578d5c04html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: NOISE Brochure 3 2015 FIN - aubedulb · and silence research group sound is 50 100 - deci els 120-140+ dba avoid or use hearing protection 90-110 dba dangerous over 30 minutes src=https:reader031vdocumentinreader031viewer20220306095ad867117f8b9a3e578d5c04html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv