Introduction: This lab was to measure the SPL for Huron church road at different locations. The measurements were taken using a sound level meter. The results were molded using an ORNAMENT model procedure. Procedure: Each group is to mount the Sound Level Meter on the tripod at least 20 metres from the edge of the selected roadway.Measure and sketch the critical dimensions of the roadway Use the Sound Level Calibrator to check the calibration of the Sound Level Meter after it has been turned on.Measure the A-weighted one hour equivalent sound pressure level over a 10 minute period.During the period that the Sound Level Meter is recording data, count the number of vehicles that pass in each direction including the breakdown of the three types of vehicles. Figure1: Print of the measuring location Equipment: B&K Type 2250 Sound Level Meters, B&K Type 4231 Sound Level Calibrator, Tripod, Measuring Tape Results: Question 1: 1Lanes/Road Section (Element)EastboundWestbound 2Volume Automobiles (vph) 606 600 3Medium Trucks (vph) 366 4Heavy Trucks (vph) 318240 5Total Volume (vph) 960846 6Posted Speed (km/h) 6060 7Heavy Trucks (%)Lines 4/50.331250.2836 Adjusted Heavy Trucks 8Road Gradient (%) 0 0 9Adjustment FactorTable 111 10Adjusted Volume (vph)Lines 4*9318240 11Total Trucks (vph)Lines 3+10354246 12Medium Trucks (%)Lines 3/110.10160.024 13Total Trucks/Total Volume (%)Lines 11/50.36870.2907 14Reference Sound Level (dBA)Tables 3-6 or Eqn 1 62.74 62.02 Effective Heights 15Source (s) (m)Table 8 or Eqn 22.4 2.30 16Receiver (r) (m)(1.5 Day, 4.5 Night)1.51.5 17Elevation Change, e (m)Figure 400 18Barrier Height, h (m)Figure 400 19Total Effective Height (m)Figure 43.93.8 Adjustments 20Volume A v (dBA)Table 2 or Eqn 3 13.8 13.25 21Distance (m) 53.4 36.8 22A dTable 7 or Eqn 4 -9.0 -6.38 Finite Segment Size 23Angle, O/ 1 (degrees)Table 10-60 -60 24Angle, O/ 2 (degrees)Table 109090 25Absorption CoefficientTable 7 or Eqn 40.6330.636 26A f (dBA)Table 9, 11 -1.9 -1.9 27Pavement Surface, A p (dBA)Table 1200 28W oods, A w (dBA)Table 1300 29Rows of Houses, A h (dBA)Table 1400 30Barrier Angle O- 1 (degrees)Table C10 0 31Angle O- 2 (degrees)Table C100 32Finite Barrier IndexTable C10 0 33PLD (m)Table C200 34A b (dBA)Table C2 65.59 67.11 35Segment Leq (dBA) 6567 36Road Leq (dBA)69.4269 Question 2: Table 1: Residential receptors made for different types of Resident Based on the results obtained for the east and west bound the SPL for both would be considered too high, since the limits of Residential areas are shown in the above table. Adjustments will have to be made to assure that the SPL of the current situation match the SPL of the residential areas. Reasons why there may be discrepancies between the modelled and measured results: Unnecessary sound around the sound level meter. That could change the outcome of the sound pressure level.Improper measurements for the roadway, and the distance from the meter to the nearest road edge.Not considering any obstacles around the area that can cause reflection, so results would be different than the modeled resultsThe sound level meter was not calibrated correctly, this could cause to different results.Miscalculating the number of automobiles, medium trucks and heavy trucks. Question 3: As sound level measurements are directly related to count number of traffic so there is high possibility that number of vehicles were miscounted which can be taken as human error. There should have been more people to count the number of vehicles. Near to experiment location, pedestrian bridge was located. It could be more accurate for counting the vehicle if the person who was assigned to count the vehicle could go over the bridge and count those vehicles.Another problem associated with sound level measurement was that number of pedestrians were talking while recordings were bring taken. That could also add some external noise to the measurements taken. That could be more precise if location was chosen where there was no pedestrian crossing. Birds chirping and tree noises could also affect the measurements Conclusion: The group has learnt how to use a sound level meter, and how to visualize the SPL data. Besides, the group learnt how to use an ORNAMENT model to measure the SPL for the situation assigned. The results seemed correct based on the calculations made. References: http://www.ambassadorbridge.com/!downloads/appendix_j_noise_study.pdf146725740_lab3_result_1_1
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Services
Ace Writing Center has stood as the world’s leading custom essay writing services providers. Once you enter all the details in the order form under the place order button, the rest is up to us.
Essays
At Ace Writing Center, Nowadays, students normally have extremely busy schedules. You will note that some of them have to take on some evening or weekend jobs in order to get some income that can help them to sustain in college or in the university. This can deny them a chance to write all the essays given. Others usually get bombarded with a lot of work by their lecturers. This can still delay such students from working on all their essays. However, some of them usually try to work on all these essays but end up delivering their work late. This can prevent them from graduating since most lecturers are strict on deadlines. If you want to write a business essay, the wise way is to hire an outstanding essay writing service like us, so that you can get the best results. If you are keen, you will note that many companies usually overcharge their customers. Some of them are there only to make money. And in reality, they really don’t care to build a long term commitment with students. You should not choose such companies. You should take your time and choose a reliable company to work with. Ace Writing Center is the ultimate solution for you. We have been offering our writing service for more than 7 years. This is a clear indication that you will get quality essay writing service. We have a wide range of writers who can work on any business essay that you might have. We believe in doing extensive research so that we can provide quality work to all our clients. .
Admissions
Admission and Business Papers
Have you ever had to write an admission essay for college? The majority of students face the same issues when applying to a university or college and many in such situations decide they need professional help to cope with this matter. They get in a situation when the deadline keeps coming closer but lack motivation to start because they are just not sure if their writing skills are strong enough. We have a solution for you! Ace Writing Center is the best admission essay writing service with a large professional team and years of experience in providing high-quality papers to students of all levels and faculties. The mission of our team is to help students make their dreams of entering a good college come true and that’s what we offer!.
Editing
Editing and Proofreading
Sometimes all the words for your paper just flow out of your mind and into your fingers. You type quickly at your keyboard and there they are, your beautiful words right there on the screen. But you have no idea how to polish it up. You may be wishing there was a paper writing service that offered this type of writing service. Look no more! Here at Ace Writing Center, we offer you an editing and proofreading option that you can't find anywhere else..
Coursework
College Essay Writing
In case you are familiar Ace Writing Center, you know the way to distinguish a better company from a cheap one exactly. First of all, poor service website does not have a sufficient support. We think support team is an essential part of success; it has to answer all clients’ questions and be a connecting link between clients and their writers. On our web-service you will get answers about anything you need and your writer will receive all your instructions, assignments and requirements exactly and swiftly. A writing service that we run has got a flexible pricing system that will save you from senseless wastes and many bonus systems that let you sparing money for something important for you.
