4. Calculate the overall A-weighted level of the spectrum below.63 Hz82 dB125 Hz77 dB250 Hz72 dB500 Hz60 dB1 kHz64 dB2 kHz57 dBBandLp4 kHz50 dB8 kHz40 dB

Given that Band 63Hz 125Hz 250Hz 500Hz 1KHz=1000Hz 2KHz=2000Hz 4KHz=4000Hz 8KHz=8000Hz LP 82dB…

Answered: 4. Calculate the overall A-weighted…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Reyesburg Corporation is contemplating using a new, more expensive glue in the construction of its laminated veneer lumber. Of importance to the company is the carrying load of the lumber. The company has tested 32 beams using the new glue, recording for each beam the pressure (in pounds per square foot) at which the beam breaks. The data collected are presented in the following frequency distribution. Carrying load (in pounds per square foot) Frequency 860 to 879 4 880 to 899 9 900 to 919 12 920 to 939 4 940 to 959 3 Based on the frequency distribution, using the midpoint of each data class, estimate the mean carrying load of the beams tested. For your intermediate computations, use four or more decimal places, and round your answer to one decimal place. pounds per square foot ?
Draw a frequency polygon based on the data.

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4. Calculate the overall A-weighted level of the spectrum below. 125 Hz Band Lp 63 Hz 82 dB 250 Hz 72 dB 500 Hz 60 dB 1 kHz 64 dB 2 kHz 57 dB 77 dB 4 kHz 50 dB 8 kHz 40 dB