This page describes current software development activities ongoing at the UCF Noise Lab.
A 32 bit version of this model is currently being released and contains many improvements to the 16 bit model. This is a beta version so we appreciate any problems or suggestions for improvement from users.
The RWNM models Leq (dB[A]) noise levels at user specified receivers from simulated train movements. The RWNM has a fully functional GUI interface and also allows multiple barrier modeling to investigate the sound level reduction of various barrier designs. In addition, the RWNM provides peak passby sound levels from trains and point sources along with 24 hour Ldn and a simulation time history of Leq sound levels.
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| Example RWNM simulation during night operations |
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| Railway Noise Model running a simulation with crossing |
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| Results displayed at the conclusion of simulation |
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For updated user-related information about the CNM, please view the
The Community Noise Model (CNM) was written by UCF and funded by the American Automobile Manufacturer's Association.
CNM models Leq (dB[A]) sound levels from automobile traffic moving either
on constant speed roadways or interrupted flow roadways. The CNM contains
a fully functional GUI interface so that users can model sites that include traffic lanes, multiple
barriers, traffic signals and receivers either with the mouse or with spreadsheet interfaces.
The UCF Community Noise Model has been converted from Visual Basic 4.0 16 bit code to Visual Basic 5.0 32 bit code for the full benefit of Windows 95 and NT users. Upcoming releases are scheduled to include new ground attenuation algorithms. These new algorithms are frequency dependent and contain an approximate solution to the governing acoustic equations in the presence of an absorptive boundary. The algorithms treat the ground as an absorptive surface that dissipates acoustic energy.
Some examples of the 32 bit constant speed and variable speed models are shown below.
An example of an intersection model created by the CNM is shown below. This site model was created in a manner of minutes with the CNM interface.
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| Highway offramp model with traffic signal |
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| New Model Wizard in 32 bit CNMV |
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