What is Sound: The Correlation Between Sound Power and Sound Pressure

Sound, it is all around at every given point of the day. Whether it is from the music we listen to, the person talking to you, your cars engine, or the wind blowing through the leaves there is no escaping it. Hearing is one of the five senses that the majority of humans rely on and should be protected at all costs and with a good understanding of what sound is, one can help mitigate damage done to their hearing. Sound can be broken down into two parts, sound power and sound pressure. But the real question is, how do these corollate to each other to become the sound that we rely on.

Sound Wave

Sound Power (Watts) is defined as the rate at which sound energy (decibels) is emitted, reflected, transmitted or received, per unit of time. Whereas, Sound Pressure is defined as the local pressure deviation from the ambient atmospheric pressure, caused by a sound wave. Based on these two definitions it can be determined that sound power is the cause that generates the sound wave and sound pressure is the effect or what we hear after the sound wave has traveled to the ear.

This can be summed up in a simple analogy using a light bulb. Light bulbs use electricity to generate a source of light, this means that the power required (also stated in Watts) to cause the bulb to light up is comparable to Sound Power. The intensity of the light being generated (stated in Lumens) would be the Sound Pressure. Sound Pressure is what we would typically hear or call sound. This is what is measured because that is the harmful aspect to our hearing and ears. If the Sound Pressure is high enough and the ear is exposed to it long enough, permanent damage can be done resulting in hearing loss to the point of complete hearing lose.

I have known many people who have lost there hearing either completely or a large portion of it from exposure to loud noises. EXAIR designs and manufactures quiet and efficient point of use compressed air products. These products either meet or exceed the OSHA noise Standards in OSHA Standard 29 CFR – 1910.95 (a).

The OSHA Standard for how long someone can be exposed to a certain noise level

If you are not sure what the noise level is in your facility check out EXAIR’s Digital Sound Level Meter. It’s an easy to use instrument for measuring Sound Pressure levels in an area.

EXAIR’s Digital Sound Level Meter

If you have questions about the Digital Sound Level Meter, or would like to talk about any of the quiet EXAIR Intelligent Compressed Air® Products, feel free to contact EXAIR or any Application Engineer.

Cody Biehle
Application Engineer
EXAIR Corporation
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EXAIR’s New and Improved Website

Evolution and constant growth are merely two constants in the life of a living business. Here at EXAIR we strive to develop new efficient and safe ways to utilize one of the costly utilities industries see, compressed air. In order to convey the information on everything we have we continually update and add items to our website. Yes, we still have a print catalog, that is still one of my favorite places to pull data from when discussing parts with customers over the phone or through online chat, it is not always as updated as our site though. With that note, we also just launched a brand new EXAIR.com.

Visit http://www.exair.com and explore our new website today!

The new site features all the information you are accustomed to from EXAIR that helps feed the data driven desires of any engineer and also makes it easy to navigate to the exact item you are looking for, add it to your cart, and get it shipped to you as well. Our new site makes it easier to locate detailed information like performance specs and dimensions, available materials and the different kit offerings we have for each product. This site reacts quicker and the look has been simplified to provide an improved user experience.

Some of the new benefits include hi resolution images for each product, 60+ native 2D and 3D CAD extensions prevent you from converting other files to work with your modeling software. Downloadable .pdf files include our complete catalog or just each product section. Related videos, FAQ’s and Case Studies are all presented with a specific product. The videos include all the wonderfully helpful videos from the Application Engineer team which provide tips, tricks and demonstrations for many of our products.

One of the most helpful features for someone who may not know exactly what they need to solve their problem is to navigate through the Solutions pathway to easily walk through over 1,000 existing product applications that are discoverable through the type of application or the industry the product application serves. You will see the multitude of problems and solutions EXAIR products are capable of solving and providing.

This is all while keeping the methods to contact us which includes our live chat option that even has some new benefits as well. We can now send you the quote you need, CAD models, or catalog sections all through the chat window while we are talking. If you need fast information and assistance, the chat feature is for you! Of course, feel free to call or e-mail as well.

Managing your account details, like adding multiple shipping locations, changing an e-mail address or retrieving your order history have also been improved and friendlier to modify. Do you already know the model number you would like to order – use the Quick Order function to get it right into your cart and complete an order. Check out the new EXAIR.com today!

Brian Farno
Application Engineer
E-mail: BrianFarno@EXAIR.com
Twitter: @EXAIR_BF

EXAIR Internationally

I would like to share a conversation with a company that I visited in Singapore.  They manufactured natural rubber material, and they were having issues with material sticking inside the oven.  In our conversation, they would have to stop the process in order to clean the area near the chopping blades where the rubber material would collect.  The system would have to be shut down for the entire day to clean the oven which lost profits and production yields.  I was familiar with this company, as they were global. 

I remembered that I helped their American counterpart with the exact same application.  I was able to make a quick recommendation for the same product; two model 110260SSPKI 60” (1,524mm) wide Stainless Steel Super Air Knives with Plumbing Kits.  They purchased and installed the Super Air Knives to generate an air curtain to keep the rubber material from sticking to the wall and forcing it into the grinder below.  This helped them to save a lot of money for unscheduled shutdowns.  If the U.S.A. company was able to share this information with their foreign counterpart, it would have been a great cost savings for the corporation as a whole. 

Since the establishment of EXAIR in 1983, customer satisfaction, quality, and quick turnaround have always been the cornerstone of our business model.   And with this type of business model, our company continues to grow each year.  Now EXAIR is recognized as a brand of excellence worldwide.  With thousands of products in stock, we are able to ship with over a 99.9% on-time delivery.  EXAIR offers free expert technical advice and share solutions to pneumatic issues through EXAIR Blogs, application library, and social media. 

In today’s market, many companies are global and have plants and facilities throughout the world.  If details like cost savings, safety, increased productivity, problem solving, and energy efficiency would be shared; it would be very beneficial for everyone.  It can help to grow profits, protect employees, improve throughput, and save energy which will help to protect the environment.  Since EXAIR is a leader in these areas with compressed air products, we can help you and your affiliates with pneumatic solutions. 

EXAIR sells direct in the U.S.A and Canada, and we have over 50 distributors located throughout the rest of the world.  EXAIR has structured our world-wide presence by country in our International Map located on our website.  It is simple to use.  To find a distributor, click on this link, International.  Fill in your Name, Email, and Country you wish to find.  We also ask if you would like to receive news about EXAIR products in the future.  You can select “Yes” or “No”.  If you would like to obtain information monthly from EXAIR about new products, special notices, or featured products, then click “Yes”.  And, if we do not have a distributor in your area, EXAIR has an International Department that can assist you directly. 

There are many ways to save money within your industry.  And one way is to use your compressed air efficiently.  If you or your affiliates use compressed air to cool, dry, clean, convey, vacuum, or remove static electricity, EXAIR can improve your process.  And if you have locations outside of U.S. and Canada, we can still help you.  You can contact us directly or visit our International Map.  You may find someone near you that can speak your language and discuss the values that EXAIR can provide.  You will be glad that you did.  And if we do not have anyone in the country and you wish to speak to us about becoming a Distributor, you can contact us through our form here: International Distribution.

John Ball
Application Engineer

Email: johnball@exair.com
Twitter: @EXAIR_jb

Photo: International Flags by GDJPixabay license.

Dead Serious About Dead End Pressure and Chip Guarding – OSHA 1910.242(b)

Compressed air is a very versatile utility that can be used for applications in cooling products to cleaning off workspaces and products. That is where OSHA 1910.242(b) comes into play; this OSHA standard states that compressed air used for cleaning shall not be used except were reduced to less than 30 psi and then only with effective chip guarding and personal protective equipment. This standard is in place because in the event a dead end occurs, the static pressure at the main orifice can potentially force the high pressure air into someone’s bloodstream and cause an air embolism, which if left untreated can impede the flow of blood in the body and lead to a fatality.

Keeping that in mind there are two ways you can go about these cleaning applications and still stay in compliance with the OSHA standard. The first way is to regulate the air pressure in your pipe down to below 30 psig. But for the majority of applications this is not an effective solution as pressure does equate to the amount of force that can be produced from the system. The second solution is to use a nozzle that is engineered in a way the it cannot be dead ended. This means that the nozzle is designed in a way that no matter how hard you try the air coming out of the nozzle will be ejected into the atmosphere and not through skin.

The fins of the Super Air Nozzle allow air to escape and prevent dead-ending the nozzle.

Take EXAIR’s Air Nozzles for example, the fins and orifice placement are designed in a way that allows air escape air into the atmosphere. Once air has exited an orifice into atmospheric conditions the pressure becomes 0 psig but retains the velocity and higher volume from the higher compressed air inlet pressure which produces force.

Model 1210 Soft Grip Safety Air is fitted with an EXAIR Super Air Nozzle. We can also supply it with a Rigid Extension and Chip Shield (right).

In addition, OSHA 1910.242(b) also talks about the use of effective chip guarding, which simply means some method or equipment shall be installed that prevents particles from flying back and hitting the operator. If you look EXAIR’s Safety air guns you will notice that we offer Chip Shields. By simply adding “-CS” to the end of a part number for a Safety Air Gun you can help prevent injuries from flying particles in blow off applications.

If you have any questions or want more information on compressed air safety and OSHA related standards. Give us a call, we have a team of application engineers ready to answer your questions and recommend a solution for your applications.

Cody Biehle
Application Engineer
EXAIR Corporation
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