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<br /> <br /> <br />Ii:; .... iiaa <br />'.'']. <br /> <br />Decibel references: <br />o dB: Threshold of hearing <br />20 dB: Whisper <br />40-45 dB: Theater between performances <br />50 dB: Normal conversation <br />65-70 dB: Traffic on busy street <br />90-100 dB: Thunder <br />120 dB: Rock concert <br />130 dB: Jackhammer <br /> <br />C) <br /> <br />{lC) C) <br /> C) <br />0 C) <br />0 0 <br /> C) <br /> 0 <br /> 0 <br /> <br />) <br />C) <br />~~C) <br />'~ 0 <br />'--0 <br />"-- <br />