The decibel, or dB, is a means of expressing the gain of an active device (such as an amplifier) or the loss in a passive device (such as an attenuator or length of cable). It is simply the ratio (!) of output to input expressed in logarithmic form. The decibel was developed by the telephone company to express the gain or loss in telephone transmission systems.
Sound intensity (sound energy quantity):
Reference sound intensity Io = 10^−12 W/m² (Threshold of hearing)
Reference sound intensity level LIo = 0 dB-SIL (Threshold of hearing level)
Get sound intensity I when entering sound intensity level LI:
Sound intensity I = Io×10^(LI/10) W/m² = 10^−12×10^(LI/10) W/m².
Get sound intensity level LI in dB when entering sound intensity I in W/m²:
Sound intensity level LI = 10×log (I / Io) dB = 10×log (I / 10^−12) dB.
Sound pressure (sound field quantity):
Reference sound pressure po = 20 µPa = 2×10^−5 Pa (Threshold of hearing)
Reference sound pressure level Lpo = 0 dB-SPL (Threshold of hearing level)
Get sound pressure p when entering sound pressure level Lp:
Sound pressure p = po×10^(Lp/20) Pa or N/m² = 2×10^−5×10^(Lp/20) Pa.
Get sound pressure level Lp in dB when entering sound pressure p in Pa:
Sound pressure level Lp = 20×log (p / po) dB = 20×log (p / 2×10^−5) dB.
To convert sone to decibel, you can use the formula: Decibels (dB) = 40 log(sone) For example, if the loudness level is 4 sones, the equivalent decibel level would be 40 log(4) ≈ 60 dB.
Decibel is abbreviated as "dB."
Yes, the decibel scale is logarithmic.
The "d" in decibel represents Alexander Graham Bell, who was an influential scientist in the development of the decibel scale. The decibel scale is used to quantify the intensity of sound or the power level of an electrical signal on a logarithmic scale.
The maximum range of detection for submarines using sonar varies depending on the decibel level. Higher decibel levels can detect submarines at greater distances compared to lower decibel levels.
To convert sone to decibel, you can use the formula: Decibels (dB) = 40 log(sone) For example, if the loudness level is 4 sones, the equivalent decibel level would be 40 log(4) ≈ 60 dB.
The Welsh word for 'decibel' is desibel.
What are the uses of DECIBEL?
How do you use the word decibel in a sentence?What is decibel used for?
The abbreviation for decibel is dB.
The bell is a large unit, so a subunit, a decibel, is usually used. There is no subunit of decibel.
another name for decibel
A decibel is a measure for sound.
Decibel is abbreviated as "dB."
A decibel is the unit of measuring the level of sound.
What is the decibel level of a car horn?
Doctor Decibel was created in 1986.