Figur 11. Lyd ved lokalitet Hattasteinen under sprenging av 850 kg emulsjon sprengstoff (Offshore Kemiitti) omtrent 1500 m unna (fra ca 1 s på tidsskala) gitt som trykk i Pascal med beregnet lydnivå i dB re 1µPa gitt som spisstrykk (0-peak) og SPLRMS for 1 s (merket med oransje) og SEL integrert over 15 s. Sound pressure in pascal measured at Hattasteinen 1500 m from detonation of 850 kg emulsion slurry “dynamite” (Offshore Kemiitti) with delay in the blast, in borehole/ confined and bubble curtain as mitigation. Estimated zero to peak sound pressure level was 174.7 dB re 1 re 1µPa and SPLRMS for 1 s (area marked with orange) was 158. 3 dB re 1µPa, and SEL integrated over 15 s was 159.1 re 1µPa2s. This signal was not filtered and hence includes frequencies from 20 -20000 Hz.
