Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Join
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Discussion
General Car Audio
Differences in frequency
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<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]
Insert quotes…
Verification
Post reply
Forum
Car Audio Discussion
General Car Audio
Differences in frequency
Top
Menu
Home
Refresh