5. A concrete barrier 100mm (4 in) thick is to be built around a transformer station located outdoors. The top of the ba

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5 A Concrete Barrier 100mm 4 In Thick Is To Be Built Around A Transformer Station Located Outdoors The Top Of The Ba 1 (122.18 KiB) Viewed 20 times

5. A concrete barrier 100mm (4 in) thick is to be built around a transformer station located outdoors. The top of the barrier is 2.50m (8.2 ft) high above the transformer and is located 10m (32.8 ft) from the transformer. The property line (receiver) is located 30m (98.4 ft) from the transformer. The directivity factor for the transformer may be taken as Q4 1. The sound power level spectrum and the transmission loss for the barrier as a function of frequency are given in the table below. Determine the sound pressure level spectrum without the barrier in place and with the barrier. Octave band center frequency, Hz Item 63 125 250 500 1,000 2,000 4,000 8,000 Given data: Lw, dB 100 TL, dB 44 112 36 116 38 110 38 106 38 106 38 95 50 89 56