Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Figure shows noise results for a prototype van measured on a rolling road. The vehicle had a four-cylinder-in-line engine. The engine speed was varied in 3rd gear from just above stall to about 4500 rpm. The sound pressure at a representative interior position was measured in dB using the standard reference, namely 20 ?Pa. Figure Q2 shows the overall noise level and also the component associated with the second harmonic of the engine speed.
a) The noise peak at 3600 rpm is due to an acoustic resonance with a standing wave between the floor and roof of the van. What is the frequency of this resonance and what is the vertical dimension of the van interior?
b) Sketch a graph of the microphone signal at 3600 rpm. Your graph should include time and sound pressure axes with scales to show the ranges for the signal you have sketched.
c) Comment on the overall results in Figure Q2 indicating if they are acceptable or if they indicate a specific NVH problem.
d) It would have been better to have measured the sound pressure in dBA. Explain why.
assigenement
Find out if the following sets of functions are linearly dependent or independent. (a) f ( x ) = 9 cos ( 2 x ) g ( x ) = 2 cos2 ( x ) - 2 sin 2 ( x ) (b) f
Evaluate following limits. Solution Let's begin with the right-hand limit. For this limit we have, x > 4 ⇒ 4 - x 3 = 0 also, 4 - x → 0 as x → 4
Consider a discrete-time system that is characterized by the following difference equation: Y(n) = x(n)cos? 0 n, where ? 0 is constant value, x(n)are the discrete-time input
One Tailed Test It is a test where the alternative hypothesis (H 1 :) is only concerned along with one of the tails of the distribution for illustration, to test a business co
Trig Substitutions - Integration techniques As we have completed in the last couple of sections, now let's start off with a couple of integrals that we should previously be
Forecasting Statistics is very significant for business managers while predicting the future of a business for illustration if a given business situation includes a independen
what is the derivatives of y=u/5+7 and u=5x-35 using the chain rule?
Determine if the line that passes through the points ( -2, -10) and (6, -1) is parallel, perpendicular or neither to the line specified by 7 y - 9 x = 15 . Solution Togive
If the difference among the squares of two consecutive integers is 15 find out the larger integer. Let x = the lesser integer and let x + 1 = the greater integer. The sentence,
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd