burque.info home - new mexico's premier music site (albuquerque, santa fe, las cruces, farmington and the greater new mexico area)
Welcome to our music community! Add your pictures, events, clubs, bands & profiles!
amps decibals  
Message Board Home >> Acoustics Theory Composition >> amps decibals

Add new topics here.



9 message(s)
started Friday September 13, 2002
last updated 19 years ago
 
angaym k oss Reply to this topic Quote this message
User info not available.
Posted Friday September 13, 2002 - 20 years ago (#2966)
can anyone explain to me the correlative relationship between watts and decibals i.e. how many watts/amps does it take to produce some specific amount of decibals, does increasing by one db double the actual volume?
band: Alchemical Burn

band: Notes From the Futureband: OHMNISCIENCEband: unnatural.elementband: COBRA GROUP
[band: (burque.info)]
efesar Reply to this topic Quote this message
efesar profile
1724 post(s).
Member since 21 years ago.
Contact this userhttp://blog.efesar.comAIM: efesarYIM: iamefesarMSNM: efesar%40efesar.com
Posted Friday September 13, 2002 - 20 years ago (#2968)
actually, yes and no. the signal strength going across a wire is measured in voltage. the power of the signal is measured in amps. the resistance is always constant, thus wattage is the relationship between voltage ...

[dbwatts.html @ home.pacbell.net in /base10]

here is a decent article ... very mathematical in nature. i will try to find something written in english.
band: efesar "underwater, darkness is as bright as daylights comes."
efesar Reply to this topic Quote this message
efesar profile
1724 post(s).
Member since 21 years ago.
Contact this userhttp://blog.efesar.comAIM: efesarYIM: iamefesarMSNM: efesar%40efesar.com
Posted Friday September 13, 2002 - 20 years ago (#2974)
Electrical stuff:
[Realtydao - Transparent Virtual Real Estate Holding and Development Platform Powered by Digital Native Assets on the Blockchain]

P = Power (watts or volt-amps)
I = Intensity (current in amps)
E = Electromotive Force (Voltage)
R = Resistance (Ohms)

P = I x E

which means: watts = amps * volts

==================

So, if your raw signal is volts, then the decibel is ***relative voltage*** meaning it's measured in dbV (relative decibel volate). You will see this on you Vu meter as -3, -9, -12 etc. In the voltage context, wattage does not relate to a decibel at all.

However, when it gets pumped through a wire to the speakers, it's get measured differently. In that context, wattage is almost directly proportionate to decibel level (because they are both inverse squares). Wattage is a measurement of Power and Decibel are measurements of intensity, which in physics can be called "the same thing." One is electrical energy and the acoustical energy.

I wish I could find some good articles online. I'll keep looking.
band: efesar "underwater, darkness is as bright as daylights comes."
efesar Reply to this topic Quote this message
efesar profile
1724 post(s).
Member since 21 years ago.
Contact this userhttp://blog.efesar.comAIM: efesarYIM: iamefesarMSNM: efesar%40efesar.com
Posted Friday September 13, 2002 - 20 years ago (#2975)
correction to previous mail:

So, if your raw signal is volts, then the decibel is relative voltage meaning it's measured in dbV (relative decibel volate). You will see this on you Vu meter as -3, -9, -12 etc. In the voltage context, wattage does not relate to ___wattage___ at all.
band: efesar "underwater, darkness is as bright as daylights comes."
efesar Reply to this topic Quote this message
efesar profile
1724 post(s).
Member since 21 years ago.
Contact this userhttp://blog.efesar.comAIM: efesarYIM: iamefesarMSNM: efesar%40efesar.com
Posted Friday September 13, 2002 - 20 years ago (#2976)
ack! nevermind! i retract the correction!
band: efesar "underwater, darkness is as bright as daylights comes."
angaym k oss Reply to this topic Quote this message
User info not available.
Posted Saturday September 14, 2002 - 20 years ago (#2993)
thanks for the tech specs, i know, this one is a bit squirelly i think.
band: Alchemical Burn

band: Notes From the Futureband: OHMNISCIENCEband: unnatural.elementband: COBRA GROUP
[band: (burque.info)]
v0sh Reply to this topic Quote this message
v0sh profile
4331 post(s).
Member since 21 years ago.
Contact this userAIM: v0sh
Posted Saturday September 14, 2002 - 20 years ago (#2996)
these are interesting correlations - i would love to hear more on the subject, just in layman's terms as i am an uneducated idiot...
-stop the boat.
gfx Reply to this topic Quote this message
gfx profile
158 post(s).
Member since 21 years ago.
Contact this userhttp://www.akoolstik.com
Posted Wednesday February 19, 2003 - 19 years ago (#5564)
short story:

in general, decibels are a kind of power ratio: Watts divided by Watts

sound decibels are a measure of sound pressure (ie: sound power): how hard does the air push between waves

a 10 db increase is needed for the average listener to
hear something "twice as loud"

the electrical watts of your system compared to the sound decibel output depends on how good your system is: you always lose some coverting one energy to another energy: ie. a crappy system does not convert electricity into sound very well

long story (math):
[dbwatts.html @ home.pacbell.net in /base10]
g f x
angaym k oss Reply to this topic Quote this message
User info not available.
Posted Tuesday February 25, 2003 - 19 years ago (#5655)
thank you thank you for this great link!:D
band: Alchemical Burn

band: Notes From the Futureband: OHMNISCIENCEband: unnatural.elementband: COBRA GROUP
[band: (burque.info)]


 

You must log in to add messages to this topic.


This topic was added to our database on September 13, 2002, and the last message was updated 19 years ago. There are messages in this topic and it has been viewed 2646 time(s).

 groups
Shows Announcements Reviews
Venues Clubs Bars Food
Instruments Hardware Software
Music and Musicians
Buy Sell Trade
General
Humor
Recording Mixing Mastering...
Producing Distributing...
Acoustics Theory Composition
 newest topics (Acoustics Theory Composition)
The Death Of Dynamic Range
////////////////////////////
Jam Strategies
you guessed it
what is this?
amps decibals
universal volume levels on...
Genres and Styles
three reasons to write music
 current topics (Acoustics Theory Composition)
The Death Of Dynamic Range
////////////////////////////
you guessed it
Jam Strategies
what is this?
three reasons to write music
Genres and Styles
amps decibals
universal volume levels on...
 message search
Keyword
 
© copyright 1993-2007 by fearstudios.com ( 31919404+160ms ). All Rights Reserved. Report a bug or make a suggestion.