Sound levels are an important safety consideration in most industrial facilities. OSHA has guidelines on allowable noise levels and exposure, covered in OSHA Standard 29CFR – 1910.95 (a). Sound levels are measured in decibels, or dB. It makes sense that a higher decibel value means a louder sound (as illustrated in the graphic below). What is not intuitive is how multiple sound levels interact and combine, or how they compare to one another.
The first thing to understand about sound levels is that they aren’t measured on a linear scale. Instead, they’re measured on a logarithmic scale. This can really throw off our intuition. For instance, a sound at 20dB is actually 10 times stronger than one at 10dB, and a sound at 30dB is 100 times stronger than 10dB. If it were a linear scale, 20dB and 30dB would only be 2 and 3 times stronger than 10dB, similar to how mass works—like 20kg being double the mass of 10kg.
You can see why this is the case with the formula for calculating sound levels, which is as follows:
It’s important to note that the sound pressure levels calculated using this formula are unweighted. To really grasp how loud something will seem to us, we have to consider how our ears pick up various frequencies. This means that low and extremely high frequencies are given less weight than on the standard decibel scale. This adjusted measurement is referred to as dBA. You can check out some typical sounds and their dBA levels in the chart below:
Because of this logarithmic scale, combining two sounds can be pretty counter-intuitive too. Our Model 1100 Super Air Nozzle generates a sound level of 74 dBA, but when you place two of them side by side, the sound level jumps to 78 dBA (and not 148dBA). This is determined using the formula below:
The specifics of this calculation are explained in this blog here, but OHSA provides a quick and easy way to calculate, as shown in the table below:
To see if you need to tackle the noise levels in your facility, you should start by taking a baseline measurement of the different processes and devices that are making the noise. EXAIR’s Sound Level Meter, Model 9104, is here to help. It’s super user-friendly and gives you a digital readout of the sound level (no need to deal with logarithms!).
If you would like to discuss sound levels in your facility, or any of your other compressed air needs, give us a call!
At EXAIR we pride ourselves on helping our customers optimize their compressed air usage. Our intelligent compressed air products are engineered to be quiet and efficient, saving you on compressed air consumption. This is just one of the six steps that we recommend in order to optimize your compressed air system.
The first step we would recommend is to measure your air consumption. If you are going to attempt to reduce air consumption in your facility, it is necessary to know what is using it. If you know the consumption of your compressed air-operated products, you can make note of this. A more comprehensive solution would be to install some of our Digital Flowmeters in branch lines in your facility. The flow data provided by this will help you narrow down the high consumption areas and processes.
The second step we would suggest is to find and fix leaks. Our Ultrasonic Leak Detector is perfect for this. According to the Compressed Air and Gas Institute, leaks should not exceed 5-10% of your system’s air supply (we would obviously want 0%, but realistically this is unachievable). However, it is not uncommon to see leaks account for over 30% of many facilities’ compressed air supply being lost through leakage. That’s a potential for a 25% gain in compressed air supply!
The third step would be to upgrade your blowoff, cooling and drying operations using engineered compressed air products. All of EXAIR’s products, like our Super Air Knives, or Super Air Nozzles, are designed with efficiency in mind. Upgrading to an efficient EXAIR product is going to reduce your consumption, sometimes dramatically so!
The fourth step is to turn off your compressed air when not in use. This may sound obvious, but it is not uncommon for compressed air products to be left running continuously. We offer many solutions here, from a simple ball valve (found in many of our Drum Vac Kits), to a solenoid valve (found in our Cabinet Cooler Systems), to our Electronic Flow Controllers – combining a solenoid valve and photoelectric sensor.
The fifth step would be to use intermediate storage near the point of use. If you are controlling your compressed air usage through the use of valves and controls, then your consumption won’t be constant. This fluctuation in demand can be evened out with the use of secondary storage, like our Model 9500-60 Receiver Tank. This will ensure you have the volume and pressure when and where you need it.
Finally, our sixth step is to control the operating pressure. More specifically, to reduce the pressure to the minimum required to get the job done. Simply installing a pressure regulator at the point of use will lead to big savings.
If you would like to start optimizing your compressed air system, then give me a call!
Noise levels or sound levels are an important consideration in many industrial settings. Noise exposure can cause irreparable damage if the necessary safety precautions are not taken. OSHA standard 29 CFR – 1910.95 (a) addresses this very concern.
But when discussing sound levels, there are two terms that frequently come up – Sound Power, and Sound Pressure. So, what’s the difference?
Sound Power (measured in watts) refers to the rate at which sound energy (measured in decibels) is emitted, reflected, transmitted, or received over time. On the other hand, sound pressure is the local pressure change from ambient atmospheric pressure caused by a sound wave. From these definitions, we can see that sound power is what creates the sound wave, while sound pressure is the result of what we perceive after the sound wave reaches our ears.
A good way of conceptualizing this is to imagine a light bulb. Light bulbs use electricity to produce light, which means the power needed (also measured in Watts) to make the bulb shine is similar to sound power. The brightness of the light produced (measured in lumens) corresponds to sound pressure. Sound pressure is essentially what we hear or refer to as sound. This is what gets measured because it can be harmful to our hearing. If the sound pressure is too high and the ear is exposed for too long, it can lead to permanent damage, hence OSHA’s regulation mentioned above. This regulation is the result of testing performed to determine what time thresholds at which permanent damage to human hearing will occur due to exposure over a period of time. The higher the sound pressure level, the less exposure time necessary to produce irreparable damage. Within this regulation is included a time weighted chart that OSHA follow for noise exposure issues that serve as the metric by which they determine if a company is in compliance. If not, they may recommend engineering changes, work process changes or require the use of PPE (hearing protection) if the other types of controls cannot be implemented.
If you would like a way to measure noise levels in your facility, EXAIR has the perfect product – EXAIR’s Digital Sound Level Meter. We have a video blog covering its benefits and operation here.
Generally speaking, compressed air-generated noise within a facility can be rather prevalent and loud. So, if you would like to discuss how EXAIR’s quiet and efficient compressed air products can help reduce noise levels in your facility, then give us a call!
Compressed air systems are the unsung heroes powering countless processes across all industries. However, they come with a hidden cost: leaks. Even the most well-maintained systems experience some level of leakage, often wasting 20-30% of a compressor’s output, according to the Compressed Air Challenge. This inefficiency translates directly into higher energy bills, increased compressor wear, and unnecessary maintenance expenses. The good news? You can take control of these losses by implementing a Leak Prevention Program. Let’s dive into how to establish such a program and why it’s a game-changer for your bottom line.
Compressed air isn’t cheap—it’s often one of the most significant energy expenses in a facility. When leaks go unchecked, you’re not just losing air; you’re losing money. A single leak can cost thousands of dollars annually, depending on its size and your energy rates. For example, at $0.07 per kWh, a leak as small as 1/8 inch can waste over $2,933 worth of compressed air per year. Multiply that by dozens of leaks across a system, and the financial impact becomes staggering. Beyond the dollars, leaks force compressors to run longer and harder, shortening their lifespan and driving up maintenance costs. A Leak Prevention Program isn’t just a nice-to-have—it’s a strategic necessity for operational efficiency and sustainability.
EXAIR provides resources and tools to help you design and execute an effective Leak Prevention Program. Here’s a step-by-step approach to getting started:
Establish a Baseline – Before you can measure improvement, you need to know where you stand. Document your current compressed air usage by tracking compressor run times, energy consumption, and system pressure. This baseline serves as your reference point to quantify savings once leaks are addressed. To measure the total volume of air, you can implement the EXAIR Digital flow meter.
Identify Leaks – Here’s where EXAIR’s Ultrasonic Leak Detector (Model 9207) shines. Leaks produce high-frequency turbulence—ultrasonic “white noise” that’s inaudible to the human ear but easily detectable with the right technology. This handheld, high-quality detector converts these ultrasonic signatures into audible sounds through headphones and displays intensity on an LED screen, allowing you to pinpoint leaks up to 20 feet away. Whether it’s a faulty fitting, a worn valve, or a cracked pipe, the detector’s precision ensures you won’t miss a thing—even in noisy industrial environments.
Document and Prioritize – Once leaks are identified, record their location, size, and estimated cost. There are two main approaches: the Seek-and-Repair method, where leaks are fixed immediately, or the Leak Tag method, where leaks are tagged and logged for scheduled repairs. For larger facilities, a master leak list can streamline tracking and ensure accountability. Prioritize repairs based on leak size and accessibility—tackling the biggest offenders first maximizes early savings.
Repair and Verify Fix the leaks using appropriate methods—tightening connections, replacing seals, or upgrading components. After repairs, use the Ultrasonic Leak Detector again to confirm the fixes hold. This verification step ensures your efforts translate into real results.
Track Savings and Optimize Compare your post-repair compressed air usage to your baseline. The reduction in energy costs, compressor runtime, and maintenance needs will reveal the program’s ROI, then you can turn your leak prevention program into a continuous improvement process.
The EXAIR Ultrasonic Leak Detector is an important building block for this program. Its ability to detect leaks quickly and accurately sets it apart from rudimentary methods like listening for hisses (which only catches the worst offenders) or using soapy water (impractical for large systems). The detector’s portability and ease of use mean your team can cover an entire facility efficiently, even during normal operations. Its directional sensitivity zeros in on leak sources, minimizing guesswork and downtime. With minimal training, your staff can become proficient, making it a practical investment for any operation.
Compressed air leaks will rob your system of its capacity, compressor life, and electrical cost. It is important to have a leak preventative program to check for leaks periodically as they can happen at any time. The EXAIR Ultrasonic Leak Detector and the Digital Flowmeters will help you accomplish this and optimize your compressed air system. Once you find and fix all your leaks, you can then focus on improving the efficiency of your blow-off devices with EXAIR products like Super Air Knives, Super Air Nozzles, and Super Air Amplifiers, and save yourself even more money. This blog is an overview of Step 2 of the Six Steps to Optimization. You may have more questions; and, that is great! You can find them in other EXAIR blogs, or you can contact an Application Engineer at EXAIR.
