By Manoj Kumar
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Define Echelon effect. (IMP) Define ultrasonic and infrasonic. What is supersonic wares. (IMP) What do you mean by audiable sound? Define magnetastriction effect. Define Piezoelectric effect. What do u mean by SONAR. (IMP) SHORT ANSWER TYPE QUESTIONS :Explain absorption and reflection of sound. What do you mean by musical sound and Noise? What is reverberation, reverberation time. Explain How it can be controlled? (IMP) Explain the reverberation time. (IMP) \54\ Applied Pbysics-II 5. Write a short note on accousting of building.
1) What is the reverberation time of a room of 3000 m 3 volume and 1850 m 3 area. u. 2 OWU, S = 1850 m 3 So Reverberation time T = ? 2 x 1850 sec. Ans. 5 sec. 5 sec. Area of absorbing surface, S = 25000 m 3 a=? u. 512owu Ans. 3) A cinema hall has a volume of 6000m 3 and total surface absorption is 20 owu. Calculate reverberation time. SOLUTION Volume, V = 6000 m 3 Surface absorption Ias = 20 owu. 165x6000 20 T = 11 sec. Ans. 4) A cinema hall of 3500m 3 volume having a seating capacity for 600 person having the following material in it .
10. What is the relation between period and frequency? 11. What is periodic and oscillatory motion? 12. M. 13. What is resonance? 14. What is a free vibration? SHORT TYPE QUESTIONS 1. Explain the Generation of wave motion by particles. 2. Differentiate between longitudnal and transverse waves. 3. Differentiate between light wave and sound wave. 4. Explain the proagation of a transverse waves. 5. M. Derive an expression for displacement. 6. M. and also derive an expression for velocity ofa particle.
A comprehensive text book of applied physics by Manoj Kumar