2. For 2 kHz plane sound wave in water incident normally on a steel plate of 1.5 cm thickness. (a) Calculate the transmission loss expressed in dB, through the steel plate into water on the opposite side. The expression for intensity transmission coefficients is as given below. Where r1 and r2 are the characteristic acoustic impedance of water and steel respectively. The velocity of sound in water is C1= 1450 m/s and density of water is pi=1g/ cm3 velocity of sound in steel C2=5800 m/s and density p2=7.8g/cm3) (b) Determine the frequency of the source for which steel plate does not interfere for sound transmission TI 1 1 + (r2/r)2 sin? k2L 2. For 2 kHz plane sound wave in water incident normally on a steel plate of 1.5 cm thickness. (a) Calculate the transmission loss expressed in dB, through the steel plate into water on the opposite side. The expression for intensity transmission coefficients is as given below. Where r1 and r2 are the characteristic acoustic impedance of water and steel respectively. The velocity of sound in water is C1= 1450 m/s and density of water is pi=1g/ cm3 velocity of sound in steel C2=5800 m/s and density p2=7.8g/cm3) (b) Determine the frequency of the source for which steel plate does not interfere for sound transmission TI 1 1 + (r2/r)2 sin? k2L