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# fef07 - Name ME 513Q Engineering Acoustics Final Exam Fall...

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Name: _________________________ ME 513Q --- Engineering Acoustics Final Exam – Fall 2007 --- 12/13/2007 Note: To help you complete this exam, you may refer to your class notes, your homework, solutions provided to you and other material distributed as part of the course, and the text (Kinsler, Frey, Coppens and Sanders) or to any other acoustics text Problem 1: ____________/30 Problem 2: ____________/20 Problem 3: ____________/20 Problem 4: ____________/20 Problem 5: ____________/20 Problem 6: ____________/20

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Problem 1. (i) What is sound? (ii) What are the characteristics of a stiffness-like impedance? (iii) When a SDOF system is driven by an external force at its natural frequency, it is said to be ____________________________________________________ . (iv) Why was the reference intensity chosen to be 1 × 10 -12 W/m 2 ? (v) In the development of the wave equation for an ideal fluid, the fluid is assumed to have no _____________________________ and to undergo __________________________ compression. (vi) When a plane wave in air hits the surface of a very deep layer of water at normal incidence, the transmitted pressure magnitude is __________________ than that of the incident wave while the transmitted intensity is ___________________ than that of the incident wave.
(vii) When considering sound transmission through a limp barrier, doubling either the _____________________ or the _______________________ causes the transmission loss of the barrier to increase by 6 dB. (viii) A “Level” has the units of _____________________________________ . (ix)

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## This note was uploaded on 12/26/2011 for the course ME 513 taught by Professor ### during the Fall '07 term at Purdue.

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fef07 - Name ME 513Q Engineering Acoustics Final Exam Fall...

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