The preliminary step taken at any drill site or construction area is an ambient sound level survey. An ambient sound level survey, or baseline survey as they’re sometimes called, collects all the sounds associated with a given environment to give you a “baseline” sound level for that specific location. Most municipalities require an ambient survey of at least 24hrs with some being as long as 72hrs. We also collect the ambient low-frequency sound levels for every location to provide a more thorough survey for our clients. At the conclusion of the ambient survey, we generate an Ambient Sound Level Survey Report which includes a description of the work site, where the ambient survey was conducted in relation to the work site, and the average ambient sound levels calculated from the data collected during the survey.
AMBIENT SOUND LEVEL SURVEYS
NOISE IMPACT MODELS & FFT ANALYSIS
NOISE IMPACT MODELS –
Noise Impact Models are a great way to evaluate and predict the noise impact potential of typical drilling & fracing operations, as well as proposed compressor stations, on a site’s adjacent surroundings. Noise impact models are usually not required in rural areas. However, in densely populated urban areas noise impact models are used to determine if noise mitigation measures should be included at the location to ensure compliance with the local noise ordinance. We utilize the most advanced noise modeling software available. FFT ANALYSIS – FFT analysis uses the Fast Fourier Transform algorithm to calculate a spectrum from a time domain signal, and is the most common type of spectral analysis tool. An FFT analyzer uses constant (or absolute) bandwidth resolution. It provides the optimum frequency resolution allowing identification of pure tone and harmonic content, as well as structural resonance. An FFT Analysis survey will identify and pin point what equipment or outside noise source is emitting the most problematic frequency. This gives the operator piece of mind and allows them to make an educated decision on how to effectively mitigate the noise issue, hence, saving time and money.
NOISE MANAGEMENT PLANS & SOUND LEVEL COMPLIANCE SURVEYS
NOISE MANAGEMENT PLANS –
Many municipalities require a Noise Management Plan, or noise abatement study, to be submitted along with the drilling permit prior to any construction or drilling activity. Our noise management plans are fully comprehensive. We take into consideration many different things including the drilling rig orientation as it relates to the pad site, the distance to the nearest affected receiver (residence, church, hospital, etc.), the type of drilling rig being operated, the number and size of the generators and mud pumps, etc. We will then recommend a number of noise abatement strategies in order to mitigate the noise as effectively as possible. SOUND LEVEL COMPLIANCE SURVEYS – Sound Level Compliance Surveys are used after the start of operations. They are used simply to determine whether or not the noise generated by the operator is in “compliance” with local ordinance.
PORTABLE SOUND PANELS
All of our Free-Standing Portable Panels are 8’ wide x 12’ tall. These panels are light weight and easily installed (no equipment necessary.) The panels share a support leg on each side and can be setup in any configuration. The panels are anchored into the ground with 1-inch iron rod stakes which are driven through the support legs and/or multiple 50lb. sandbags, to prevent the panels from blowing over. One inch angle iron braces are supplied and attached to the leg and panel for extra stability. The acoustical blanket attached to the panels are rated STC-25 and NRC- .08. The interior of the blanket consists of ½ lb. MLV (Mass Loaded Vinyl), which blocks the transmission of unwanted sound levels, and another layer of ½ inch open cell foam. The open cell foam allows noise to be absorbed into the sound wall and prevents it from being reflected back into the job site. The exterior of the blanket is covered with a gray vinyl UV-protected shell which faces away from the noise source and a vinyl mesh screen facing toward the noise source to allow for noise absorption. All materials used in the construction of the blanket have a superb FR rating. These panels can be rented daily or purchased.