what does ohms and db mean?

[d_rob1031]

Originally Posted by Strannix136

After you finish AC circuits, you'll know that most of these people are full of crap.

I'm glad I wasn't the only one thinking it...

[reider]

Originally Posted by Strannix136

After you finish AC circuits, you'll know that most of these people are full of crap.

I thought things like resistance, Ohm's law, decibel logarithmic scale etc. were supposed to be taught in high school physics class... Or physics is not a mandatory class in American schools??

[d_rob1031]

Originally Posted by reider

I thought things like resistance, Ohm's law, decibel logarithmic scale etc. were supposed to be taught in high school physics class... Or physics is not a mandatory class in American schools??

It's offered but not mandatory sadly. I took it in high school, loved it. Took it in college, cried.

[reider]

Originally Posted by d_rob1031

It's offered but not mandatory sadly. I took it in high school, loved it. Took it in college, cried.

Took in school.... and we never separated ever since...

[powerSURG]

Originally Posted by musicman1999

No, doubling your power adds 3 DB, it is not the same. DB is a measure of volume, like a power saw is 110 DB measured with a sound meter three feet away.


bill

You seem to be confused.

http://dictionary.reference.com/browse/decibel

I'm in the Communications field and we use dB/db as the unit of measure all the time (unless we chose to view wattage.) No speakers are used what so ever. db is not simply a measure of volume.

If you really want to get technical, sound is actually an electrical signal with all the properties of one; tiny voltages are captured by, and translated by your ear/brain. (with again, tiny voltages produced by the brain) db is the measurement of that intensity, which would be, the amount of power.

[d_rob1031]

Originally Posted by reider

Took in school.... and we never separated ever since...

haha, what do you do now?

[d_rob1031]

Originally Posted by powerSURG

You seem to be confused.

http://dictionary.reference.com/browse/decibel

I'm in the Communications field and we use dB/db as the unit of measure all the time (unless we chose to view wattage.) No speakers are used what so ever. db is not simply a measure of volume.

If you really want to get technical, sound is actually an electrical signal with all the properties of one; tiny voltages are captured by, and translated by your ear/brain. (with again, tiny voltages produced by the brain) db is the measurement of that intensity, which would be, the amount of power.

Exactly, which is why db's make you go deaf, not watt's

[musicman1999]

Originally Posted by powerSURG

You seem to be confused.

http://dictionary.reference.com/browse/decibel

I'm in the Communications field and we use dB/db as the unit of measure all the time (unless we chose to view wattage.) No speakers are used what so ever. db is not simply a measure of volume.

If you really want to get technical, sound is actually an electrical signal with all the properties of one; tiny voltages are captured by, and translated by your ear/brain. (with again, tiny voltages produced by the brain) db is the measurement of that intensity, which would be, the amount of power.

No, read the link, it lists 10 meaning one of which was a unit of measure for the volume of sound which would be the one relevant to the heart of the matter.

bill

[reider]

Originally Posted by powerSURG

You seem to be confused.

http://dictionary.reference.com/browse/decibel

I'm in the Communications field and we use dB/db as the unit of measure all the time (unless we chose to view wattage.) No speakers are used what so ever. db is not simply a measure of volume.

If you really want to get technical, sound is actually an electrical signal with all the properties of one; tiny voltages are captured by, and translated by your ear/brain. (with again, tiny voltages produced by the brain) db is the measurement of that intensity, which would be, the amount of power.

You seem to be confused no less...

Almost anything can be measured in decibels: volume, amplification, attenuation, sensitivity, etc....it just a logarithmic unit of measure.... 2times=approx. 3db; 10times=10db; 100times=20db; and so on ...

And please, don't get technical...."sound is actually an electrical signal"... my god! Human perception of sound reminiscent to an electromechanical system similar to a microphone. But there is nothing electrical about sound itself: It is a mechanical (vibrational) wave transmission.

[reider]

Originally Posted by d_rob1031

haha, what do you do now?

BS -> MS -> PhD ...in physics. Sadly, not an a/v expert though...
This will explain better what I do
http://patft.uspto.gov/netacgi/nph-P...FIELD2=&d=PTXT

[IamNhobdy]

Originally Posted by reider

You seem to be confused no less...

Almost anything can be measured in decibels: volume, amplification, attenuation, sensitivity, etc....it just a logarithmic unit of measure.... 2times=approx. 3db; 10times=10db; 100times=20db; and so on ...

And please, don't get technical...."sound is actually an electrical signal"... my god.Human perception of sound reminiscent to an electromechanical system similar to a microphone. But there is nothing electrical about sound itself: It is a mechanical (vibrational) wave transmission.

Damn you for first saying what I wanted to say! hahaha

[gargantuo]

Not to change the subject, but all the impedance talk makes me ask this question:

Does anybody have any old school tube receivers?

[reider]

Originally Posted by gargantuo

Not to change the subject, but all the impedance talk makes me ask this question:

Does anybody have any old school tube receivers?

Hmm, that's probably a very cool device ... I wonder how a tube receiver would compare to a FET one...
I have Marshall's guitar tube amplifier and this thing is amazing... cost me a fortune though.

[reider]

Originally Posted by Strannix136

Here's a great link for dB:

http://www.phys.unsw.edu.au/jw/dB.html

The math can be done on any calculator with a LOG key.

Great link indeed, thanks!
It is a very good collection of information on decibel term applicable to sound/audio.

[reider]

Originally Posted by Strannix136

Too cool! I have two of Marshall's JCM 800 re-issues, and a 1988 2550.

These are awesome...
I have the 1959HW.

[d_rob1031]

Originally Posted by gargantuo

Not to change the subject, but all the impedance talk makes me ask this question:

Does anybody have any old school tube receivers?

A guy here in town has 2 or 3 McIntosh tube receivers, they are amazing looking. There's no telling how much they are worth.

[saprano]

i hope this goes on forever, i never learned so much in my life ( less arguing tho guys )

[powerSURG]

Originally Posted by reider

You seem to be confused no less...

Almost anything can be measured in decibels: volume, amplification, attenuation, sensitivity, etc....it just a logarithmic unit of measure.... 2times=approx. 3db; 10times=10db; 100times=20db; and so on ...

My argument was simply that db is not ONLY a measure of volume. "db is not simply a measure of volume" Thanks for validating my argument.

Originally Posted by reider

And please, don't get technical...."sound is actually an electrical signal"... my god! Human perception of sound reminiscent to an electromechanical system similar to a microphone. But there is nothing electrical about sound itself: It is a mechanical (vibrational) wave transmission.

You're 100% correct on this as well. I was incorrect in saying sound is electrical, I skipped the conversion and went straight to human perception. You got really technical.

[jomari]

Originally Posted by saprano

i hope this goes on forever, i never learned so much in my life ( less arguing tho guys )

problem is, you'd have to distinguish which is what you NEED to learn. this thread may be complicated, but once you find out what is true, then enlightenment occurs.

[saprano]

Originally Posted by jomari

problem is, you'd have to distinguish which is what you NEED to learn. this thread may be complicated, but once you find out what is true, then enlightenment occurs.

yea i know, but i never had the slightist idea what these things ment, now i somewhat do.