Answered: The sound level for a jet plane on the…

The sound level for a jet plane on the ground with sound pressure of 2000 µ bar should be (a) 60 dB (c) 140 dB (b) 100 dB (d) 180 dB

Construction Materials, Methods and Techniques (MindTap Course List)

4th Edition

ISBN:9781305086272

Author:William P. Spence, Eva Kultermann

Publisher:William P. Spence, Eva Kultermann

Chapter32: Acoustical Materials

Section: Chapter Questions

Problem 13RQ

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Concept explainers

Fluid Materials

In general terms, anything that flows can be termed as a fluid. In other words, a fluid is any substance that cannot resist shear forces and deforms continuously under the application of external shear forces. Fluid materials differ completely from solid materials such as metals and alloys. For instance, if we consider two infinitesimally small cross-sectional areas of fluid materials and solid materials, and apply shear forces to these elements, both the elements will undergo deformation. Upon releasing the shear force, the element of the solid materials will regain its original orientation, but the element of the fluid materials will keep on deforming continuously under the action of the shear force.

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The sound level for a jet plane on the ground with sound pressure of 2000 µ bar should be
(a) 60 dB
(c) 140 dB
(b) 100 dB
(d) 180 dB

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