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A loudspeaker diaphragm 0.2 m in diameter is vibrating at 1 kHz with an amplitude of 0.01×10−3 m. Assume that the air molecules in the viscinity have the same amplitude of vibration. Density of air is 1.29 kg/m3. Then match the items given in column I to that in column II. (Take velocity of sound = 340 m/s. ) Column I Column II i. Pressure amplitude immediately in front of the diaphragm is (in N/m2) a. 2.7×10−2 ii. Sound intensity in front of the diaphragm is (in W/m2 ) b. 2.15×10−5 iii. The acoustic power radiated is (in W) c. 27.55 iv. Intensity at 10 m from the loud speaker (in W/m2) d. 0.865 |
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Answer» A loudspeaker diaphragm 0.2 m in diameter is vibrating at 1 kHz with an amplitude of 0.01×10−3 m. Assume that the air molecules in the viscinity have the same amplitude of vibration. Density of air is 1.29 kg/m3. Then match the items given in column I to that in column II. (Take velocity of sound = 340 m/s. )
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