Looking for TWIN_ TURBO email
12-15-2007, 02:44 PM
#23
Le Mans Master
Member Since: Apr 2000
Location: cincinnati ohio
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St. Jude Donor '09
What's a DB?
The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Its logarithmic nature allows very large or very small ratios to be represented by a convenient number, in a similar manner to scientific notation. Since it expresses a ratio of two quantities, it is a dimensionless unit.
The decibel is useful for a wide variety of measurements in acoustics, physics, electronics and other disciplines because it linearizes a physical value – e.g. light intensity or level of noise – in which exponential changes of magnitude are perceived by humans as being more or less linearly related (in other words, a doubling of actual intensity causes perceived intensity to always increase by roughly the same amount, irrespective of the original intensity level). Specifically, an increase of 3 dB corresponds to an approximate doubling of power. (In exact terms, the factor is 103/10, or 1.9953, about 0.24% different from exactly 2.) Since in many electrical applications power is proportional to the square of voltage, an increase of 3 dB implies an increase in voltage by a factor of approximately √2, or about 1.41. Similarly, an increase of 6 dB corresponds to approximately four times the power and twice the voltage, and so on. (In exact terms the power factor is 106/10, or about 3.9811, a relative error of about 0.5%.) See the formulae below for further details.
A decibel is one tenth of a bel (B). Devised by engineers of the Bell Telephone Laboratory to quantify the reduction in audio level over a 1 mile (approximately 1.6 km) length of standard telephone cable, the bel was originally called the transmission unit or TU, but was renamed in 1923 or 1924 in honor of the Bell System's founder and telecommunications pioneer Alexander Graham Bell. In many situations, however, the bel proved inconveniently large, so the decibel has become more common.
The decibel is not an SI unit. In April 2003, the International Committee for Weights and Measures (CIPM) considered a recommendation for its inclusion in the SI system and decided not to adopt that recommendation.[1] Following the SI convention, the d is lowercase, as it represents the SI prefix deci-, and the B is capitalized, as it is an abbreviation of a name-derived unit (the bel). The full name decibel follows the usual English capitalization rules for a common noun. The decibel symbol is often qualified with a suffix, which indicates which reference quantity has been assumed. For example, "dBm" indicates that the reference quantity is one milliwatt. The practice of attaching a suffix in this way, though not permitted by SI,[2] is widely followed.
The definitions of the decibel and bel use base-10 logarithms. For a similar unit using natural logarithms to base e, see neper.
The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Its logarithmic nature allows very large or very small ratios to be represented by a convenient number, in a similar manner to scientific notation. Since it expresses a ratio of two quantities, it is a dimensionless unit.
The decibel is useful for a wide variety of measurements in acoustics, physics, electronics and other disciplines because it linearizes a physical value – e.g. light intensity or level of noise – in which exponential changes of magnitude are perceived by humans as being more or less linearly related (in other words, a doubling of actual intensity causes perceived intensity to always increase by roughly the same amount, irrespective of the original intensity level). Specifically, an increase of 3 dB corresponds to an approximate doubling of power. (In exact terms, the factor is 103/10, or 1.9953, about 0.24% different from exactly 2.) Since in many electrical applications power is proportional to the square of voltage, an increase of 3 dB implies an increase in voltage by a factor of approximately √2, or about 1.41. Similarly, an increase of 6 dB corresponds to approximately four times the power and twice the voltage, and so on. (In exact terms the power factor is 106/10, or about 3.9811, a relative error of about 0.5%.) See the formulae below for further details.
A decibel is one tenth of a bel (B). Devised by engineers of the Bell Telephone Laboratory to quantify the reduction in audio level over a 1 mile (approximately 1.6 km) length of standard telephone cable, the bel was originally called the transmission unit or TU, but was renamed in 1923 or 1924 in honor of the Bell System's founder and telecommunications pioneer Alexander Graham Bell. In many situations, however, the bel proved inconveniently large, so the decibel has become more common.
The decibel is not an SI unit. In April 2003, the International Committee for Weights and Measures (CIPM) considered a recommendation for its inclusion in the SI system and decided not to adopt that recommendation.[1] Following the SI convention, the d is lowercase, as it represents the SI prefix deci-, and the B is capitalized, as it is an abbreviation of a name-derived unit (the bel). The full name decibel follows the usual English capitalization rules for a common noun. The decibel symbol is often qualified with a suffix, which indicates which reference quantity has been assumed. For example, "dBm" indicates that the reference quantity is one milliwatt. The practice of attaching a suffix in this way, though not permitted by SI,[2] is widely followed.
The definitions of the decibel and bel use base-10 logarithms. For a similar unit using natural logarithms to base e, see neper.
12-15-2007, 03:46 PM
#24
Drifting
Member Since: Aug 2003
Location: Lakeland FL
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IBTL
Since you asked, this is a DB. It is kind of funny that they are obsessed with him over there at times.
Since you asked, this is a DB. It is kind of funny that they are obsessed with him over there at times.
Last edited by ShinodaVette; 12-15-2007 at 03:49 PM.
12-16-2007, 10:04 AM
#30
Safety Car
12-16-2007, 11:46 AM
#31
Former Vendor
How about this for an idea? END THIS THREAD. There are two forums, some (like me) enjoy this one ,some like the other, and some like both. That's good enough for me.
12-16-2007, 01:28 PM
#33
Melting Slicks
Actually I enjoy both sites...........
And the "other" C3 forum seems to be moving pretty good lately with useful information and topics.
EDIT: I also wanted to add after browsing the threads that you have way less (if not "none") bickering and arguing on the the other forum, hence the reason why I spend most of my time there...
And the "other" C3 forum seems to be moving pretty good lately with useful information and topics.
EDIT: I also wanted to add after browsing the threads that you have way less (if not "none") bickering and arguing on the the other forum, hence the reason why I spend most of my time there...
Last edited by 1982CorvetteDude; 12-16-2007 at 04:15 PM.
12-16-2007, 07:07 PM
#34
Burning Brakes
Member Since: Oct 2004
Location: Loveland Colo
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What's a DB?
The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity.......
The decibel is.....level of noise – in which exponential changes of magnitude are perceived by humans as being more or less linearly related (in other words, a doubling of actual intensity causes perceived intensity to always increase by roughly the same amount, irrespective of the original intensity level). Specifically, an increase of 3 dB corresponds to an approximate doubling of power........an increase of 6 dB corresponds to approximately four times the power and twice the voltage, and so on.......
.......Devised by engineers of the Bell Telephone Laboratory to quantify the audio level..........
..... as it is an abbreviation of a name-derived unit............
The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity.......
The decibel is.....level of noise – in which exponential changes of magnitude are perceived by humans as being more or less linearly related (in other words, a doubling of actual intensity causes perceived intensity to always increase by roughly the same amount, irrespective of the original intensity level). Specifically, an increase of 3 dB corresponds to an approximate doubling of power........an increase of 6 dB corresponds to approximately four times the power and twice the voltage, and so on.......
.......Devised by engineers of the Bell Telephone Laboratory to quantify the audio level..........
..... as it is an abbreviation of a name-derived unit............
Yep that's the definition of a dB alright........
Edit: Guess I better add this so nobody's panties get in a wad, "That's joke, son, that's a joke."
Last edited by JPhil; 12-16-2007 at 07:49 PM.
12-17-2007, 12:54 AM
#36
Melting Slicks
12-20-2007, 12:49 AM
#38
Melting Slicks
Originally Posted by turtlevette
yea, a bunch of wealth went Digitial.
Maybe so, but the juvenile attitude held by some is just sad. Is that because you and DB were not allowed to join/were kicked off the Digital Forum?
Did you an DB try and join or is this all a rumor? If you guys tried to join, WHY? That juvenile attitude should have kept you away.
yea, a bunch of wealth went Digitial.
Maybe so, but the juvenile attitude held by some is just sad. Is that because you and DB were not allowed to join/were kicked off the Digital Forum?
Did you an DB try and join or is this all a rumor? If you guys tried to join, WHY? That juvenile attitude should have kept you away.
12-20-2007, 04:53 AM
#40
Team Owner
Member Since: Oct 2004
Location: Springfield MO
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St. Jude Donor '07
On the other hand, I know about the fake "DB" accounts that have been opened at DC for the purpose of ridiculing Matt, as well as the fact that posters from that site have followed him to non-Corvette sites just to continue their petty
. I think that speaks for itself.As I have said before, we all love Corvettes. There's no reason for any silly playground hostility.
Last edited by I'm Batman; 12-20-2007 at 04:56 AM.