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In addition, information on hearing damage from exposure to each level of noise is given. You can also measure decibels using computer programs like Audacity or Decibel reader. Another option is to use a profession decibel meter, which can give you a very accurate decibel reading. For a handy chart showing the approximate decibel levels for common noises, read on!

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Download Article Explore this Article methods. Tips and Warnings. Related Articles. Article Summary. Method 1 of Method 2 of Use your computer. With the right programs and equipment, it's not difficult to measure the decibel level of a sound using your computer.

Listed below are just a few ways to do this. Note that better recording equipment will always give you better results — in other words, while your computer's default internal microphone may be sufficient for some tasks, a high-quality external microphone will be much more accurate. The app uses your computer's microphone to read noises up to 96 decibels. Similar devices are available from the iTunes app store for Apple products.

For instance, Audacity, a free sound recording program, includes a simple built-in decibel meter. Use a mobile app. For measuring sound levels on the go, mobile apps can be extremely convenient. Though the microphone on your mobile device isn't as Cheap Digital Tape Measure Effect likely to be as high-quality as the sorts of external mics you can connect to a computer, they can be surprisingly accurate.

For instance, it's not uncommon for readings from mobile apps to be within 5 decibels of the readings from professional equipment. Use a professional decibel meter. Though it's not usually cheap, perhaps the most direct, accurate way to find the decibel level of a sound you with to analyze is to use a decibel meter. Also called a "sound level meter", this specialized tool available from online retailers and specialty stores uses a sensitive microphone to measure the amount of noise in the environment and give you a precise decibel value.

For instance, another type of tool called a "noise dosimeter" performs basically the same function as a standard sound level meter. Method 3 of For everyday practical purposes, decibels are usually seen as a simple measure of loudness. However, the truth is a little more complex.

In physics, decibels are often thought of as a convenient way of expressing the intensity of a sound wave. The larger the amplitude of a given sound wave, the more energy it transmits, the more it moves the air particles in its path, and the more "intense" the sound is.

To better understand the relationship between intensity measurements and decibels, let's follow along with an example problem. For the purposes of this problem, let's say that we're music producers and we're trying to find the background noise level in our recording studio to improve the sound of our records. In the next few steps, we'll use this info to find the decibel level of the background noise in our studio.

Divide by 10 To begin, divide by 10 0. Take the Log 10 of your answer and multiply by To finish solving, all you need to do is take the base 10 logarithm of your answer, then, finally, multiply by This accounts for the fact that decibels are logarithmic units with a base of 10 — in other words, an increase of 10 decibels means that the loudness of the sound has doubled.

Our example is easy to solve. Therefore, the background noise in our studio has a loudness of 10 decibels. This is quite quiet, but still detectable with our high-quality recording equipment, so we'll probably need to eliminate the source of the noise for the best recordings. Understand the logarithmic nature of decibel values.

As noted above, decibels are logarithmic units with a base of For any given decibel value, a noise 10 decibels greater is twice as loud, a noise 20 decibels greater is 4 times as loud, and so on. This makes it easy to describe the huge range of sound intensities that can be picked up by the human ear. The loudest sound the ear can hear without experiencing pain is more than one billion times more intense than the quietest noise it can detect.

Not only does this keep the blade in place whilst measuring, it also guarantees an accurate measurement by compensating for the thickness of the metal hook in the measurement. Be sure to use the hook properly when using your tape measure! Some pocket tape measures feature a case with a known length e. Most tapes, however, leave it up to the user to take the length of the case into account.

When taking an internal measurement, therefore, it is important to bend the blade at the point Ryobi Digital Tape Measure Level at which it touches the object you're measuring to. Do not assume that the tape has taking the case length into account unless you are using one of the more advanced tapes mentioned above.

Whatever you do, never allow the blade and hook to return uncontrolled at full speed when rewinding. Whilst the ability to return the blade quickly into the case can seem like a useful function, it can be very dangerous with a number of people each year being injured by wildly flailing hooks. What's more, some tape measures regardless of expense or quality can feature steel blades with relatively sharp edges.

They may not feel sharp at first but it can be a very different story when travelling at speed. Written by Ian Johnson.

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