Science
Computer Cooling Fan Acoustic Calibrator & Noise Instrumentation Worksheet

Question Description

Answer the questions on the attachment

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At which frequency (_________Hz), the weighting among A, B and C have the same reading? A female employee is required to work in different working environments with the following time and noise level: 85 dBA for 4 hrs, 90.5 dB for 2 hrs, and 92.3 dB for 2 hrs. If you use noise dosimeter to monitor her noise exposure, what the reading result (noise dose) will be? Will it be in compliance and explain the reason? Most of sound level meters are used to measure __________ (sound power, intensity or pressure). Which frequency weighting (A, B, C or F) should you use for octave band analyzer? Briefly explain the reason. Please determine the lower and upper band limits (that is, f1 and f2) for the naming octave band 4,000 Hz An acoustic calibrator usually can produce a reference sound level of _____ dB at 1 KHz. A computer cooling fan has 5 blades rotating with 6,000 rpm, what is the blade pass frequency? If you want to use a sound level meter for noise measurement to comply with OSHA regulations, you need use a meter with setting of ______________ (one of frequency weightings), ______________ (one of time weightings), and __________________ (the level of accuracy / one of ANSI types). Briefly explain why these settings are needed. What's difference between time weightings: Slow response and Fast response? What is the LAS? Why is the post-calibration for your sound level meter necessary: Briefly explain the main difference and their primary application among three type of sound level meter types according to the ANSI S1.4 standard Noise dosimeter has filter settings for frequency (A/B/C/Z), time response (Slow vs Fast vs Impulse), and ANSI type for accuracy (0, 1 and 2). Using the attached Quest Edge eg5 manual or other credible sources as references, please discuss what filter settings should you use for OSHA compliance, and briefly explain why these settings are needed. Why is the pre-calibration for your sound level meter necessary? Read the two manuals, and explain why you should use windscreen when you use instruments to measure sound level? ...
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Final Answer

Hey buddy, I'm still working on this

At which frequency (____1000_____Hz), the weighting among A, B and C have the same
reading?

A female employee is required to work in different working environments with the following
time and noise level: 85 dBA for 4 hrs, 90.5 dB for 2 hrs, and 92.3 dB for 2 hrs. If you use
noise dosimeter to monitor her noise exposure, what the reading result (noise dose) will be?
Will it be in complia...

DrAres (1408)
UIUC

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