Kam Ng | Acoustical Solutions

Kam Ng

Vice President of Engineering


Message Kam

  • North Carolina

Chemical Manufacturing Facility


A chemical manufacturing facility in Wilmington sought to improve noise levels throughout the plant for more reasons than just meeting OHSA regulations. Though existing levels did not exceed OSHA limits, the company is pushing to reduce overall noise exposure. Going above and beyond regulations to improve working conditions is more beneficial to the employees and company. The goal of this in-plant industrial noise survey is to eventually lower the manufacturing floor noise level. The company wants to objectively reach ALARP (as low as reasonably possible).

Service Provided:

To establish the main contributors of the noise, a full on-site acoustical survey is necessary. Then, measures to specifically target noise treatment solutions could be devised.  The OSHA operators expose time-weighted approach (TWA) is an overall average measurement. Our intent is to measure and address the noise levels of specific individual machines.

Once we acquire the data, we use it to generate a 3D computer model. The SoundPlan software enables high accuracy predictions for noise reductions solutions. Theoretically modelling potential solutions in a target area allows for a specific detailed cost benefit analysis to be conducted for each potential treatment. Customers may then make a more informed decision about the best reduction per dollar spent.

Specific Challenges:

One area of significant noise contribution is a row of large air compressors. Due to openings in the surrounding wall, the noise easily bleeds into the surround manufacturing areas. This exposes the operators to excessive noise levels. Thanks to the aid of computer modelling of theoretical outcomes, we are able to discover a not so typical prediction. 

In the chemical manufacturing facility modeling we learned some things may be counter intuitive. Conventional wisdom would dictate that the addition of several areas of absorptive treatment would be beneficial. However, the predictive model did not warrant reductions substantial enough using absorption only. Thus, the highest efficiency solution for this project is a partial barrier blanket enclosure. The proposed solution includes using ABSC-25 sound barrier blankets with sliding access doors. This will allow for easy access or entire removal of the treatment for maintenance or removal of the machinery.

To request information or a quotation for our Acoustical Testing and Analysis services, please contact us here or give us a call at 1.800.782.5742.