Sound levelDomestic air conditionerOctave band center frequency(Hz)approximatethresholdhearing forcontinuousnoiseheatingcooling63 125 250 500 1000 2000 4000 80002030405060708053 106 212 425 850 1700 3400 6800NC-70NC-60NC-50NC-40NC-30NC-20Octave band center frequency(Hz)approximatethresholdhearing forcontinuousnoise63 125 250 500 1000 2000 4000 80002030405060708053 106 212 425 850 1700 3400 6800NC-70NC-60NC-50NC-40NC-30NC-20HSU-09HA103/R2(DB) 40.0/39.944.1/44.837.4/36.740.8/40.9 37.2/35.950/5054/5535.2/34.7ModelSound presure level230V,50HzCooling/heatingMeasuring location sound power level(cooling/heating)H L SLLocation of microphone10 Sound levelHSU-09(12)HA/HVA/RHA103/R2(DB)HSU-12HA103/R2(DB)HSU-09HA103/R2(DB) HSU-09HA103/R2(DB)Octave band center frequency(Hz)approximatethresholdhearing forcontinuousnoise63 125 250 500 1000 2000 4000 80002030405060708053 106 212 425 850 1700 3400 6800NC-70NC-60NC-50NC-40NC-30NC-20Octave band center frequency(Hz)approximatethresholdhearing forcontinuousnoise63 125 250 500 1000 2000 4000 80002030405060708053 106 212 425 850 1700 3400 6800NC-70NC-60NC-50NC-40NC-30NC-20HSU-12HA103/R2(DB) HSU-12HA103/R2(DB)cooling heating66,1'22528 7'225