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Differences in frequency
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<blockquote data-quote="El-Camino" data-source="post: 8537354" data-attributes="member: 658812"><p><span style="color: black"><span style="font-size: 12px">For those who like using calculators</span></span></p><p></p><p>it is correct and decibel (SPL) is logarithmic.</p><p></p><p>Sound pressure level (SPL) or acoustic pressure level is a logarithmic measure of the effective pressure of a sound relative to a reference value.</p><p></p><p>Sound pressure level, denoted Lp and measured in dB, is defined by[4] (wikipedia, 21016) retrieved from <a href="https://en.wikipedia.org/wiki/Level_(logarithmic_quantity" target="_blank">https://en.wikipedia.org/wiki/Level_(logarithmic_quantity</a>)</p><p></p><p>In simpler terms, think of it as a ratio. So 40db is not half as loud as 80db but a ratio of. so to get 80db spl from 40db spl, you would need more than 100% more power according to the ratio. This is because if pascals was used as a reference for sound pressure being that it is the unit of measure for pressure and sound is pressure, the numbers would be ridiculously small. 1 pascal is equal to 94 db spl So, to simplify the measurement, we use db spl. All it is is another form of expressing numbers and values.</p><p></p><p>The Decibel</p><p></p><p>A logarithm function is the inverse of the exponent function. Examples of exponents are:</p><p></p><p>102 = 100</p><p></p><p>103 = 1000</p><p></p><p>10-1 = 0.1</p><p></p><p>The inverse of this, the logarithm function (log10), is as follows:</p><p></p><p>log10(100) = 2</p><p></p><p>log10(1000) = 3</p><p></p><p>log10(0.1) = -1</p><p></p><p>The last equation can be spoken as, “the log base 10 of 0.1 equals -1.” The decibel unit (symbol dB) is a logarithmic unit expressing the ratio between two values. The decibel was named in honor of the famous scientist Alexander Graham Bell (1847-1922). When measuring sound, we use the following logarithmic formula to determine the sound pressure level (SPL) in decibels.</p><p></p><p>(Thermax jackets, 2015). Retrieved from <a href="http://www.thermaxxjackets.com/sound-pressure-math/" target="_blank">How To Calculate Sound Pressure &amp; Sound Pressure Level</a></p></blockquote><p></p>
[QUOTE="El-Camino, post: 8537354, member: 658812"] [COLOR=black][SIZE=12px]For those who like using calculators[/SIZE][/COLOR][SIZE=12px][/SIZE] it is correct and decibel (SPL) is logarithmic. Sound pressure level (SPL) or acoustic pressure level is a logarithmic measure of the effective pressure of a sound relative to a reference value. Sound pressure level, denoted Lp and measured in dB, is defined by[4] (wikipedia, 21016) retrieved from [URL="https://en.wikipedia.org/wiki/Level_(logarithmic_quantity"]https://en.wikipedia.org/wiki/Level_(logarithmic_quantity[/URL]) In simpler terms, think of it as a ratio. So 40db is not half as loud as 80db but a ratio of. so to get 80db spl from 40db spl, you would need more than 100% more power according to the ratio. This is because if pascals was used as a reference for sound pressure being that it is the unit of measure for pressure and sound is pressure, the numbers would be ridiculously small. 1 pascal is equal to 94 db spl So, to simplify the measurement, we use db spl. All it is is another form of expressing numbers and values. The Decibel A logarithm function is the inverse of the exponent function. Examples of exponents are: 102 = 100 103 = 1000 10-1 = 0.1 The inverse of this, the logarithm function (log10), is as follows: log10(100) = 2 log10(1000) = 3 log10(0.1) = -1 The last equation can be spoken as, “the log base 10 of 0.1 equals -1.” The decibel unit (symbol dB) is a logarithmic unit expressing the ratio between two values. The decibel was named in honor of the famous scientist Alexander Graham Bell (1847-1922). When measuring sound, we use the following logarithmic formula to determine the sound pressure level (SPL) in decibels. (Thermax jackets, 2015). Retrieved from [URL="http://www.thermaxxjackets.com/sound-pressure-math/"]How To Calculate Sound Pressure & Sound Pressure Level[/URL] [/QUOTE]
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