Decibel

decibel (Korean: 데시벨) is a movie. The Korean release date is 2022-11-16. The running time is 110 minutes.
A bomb designer trying to seize the city center and his target, a former naval subship.
A sound terror action by Naga. The sound of a kettle boiling water, the sound of opening a window, the laughter of children playing... After a while, the sound of a single-family house exploding with a loud bang was heard.
breaking news will be conveyed. Then, former Navy Vice Captain (Kim Rae Won), who was watching the news, received a phone call. “If the noise gets too loud, it will explode.The next target is a soccer competition.
A bomb designer (Lee Jung-seok), unaware of the situation, selects a soccer stadium filled with spectators as his next terrorist target.
The danger of a special bomb that explodes the moment the noise gets louder continues, and in order to prevent the biggest urban bombing in history, you must have all the secrets in your hands.
I have to find the bomb designer... . The Korean movie "Decibel" is about a bomb designer who tries to take over the city center with a special bomb that explodes the moment the noise gets louder, and his target.
A sound terror action story about a former naval vice captain who has become a monster.


Decibel (㏈) is a dimensionless unit used in electrical engineering, vibration and acoustic engineering, etc. Decibel is in the International System of Units (SI).
Although it is used, it is defined as a unit that does not belong to the SI. The decibel is the common logarithm of the power ratio to a certain standard power of sound.
This is an amount equivalent to 1/10 (= deci[d]). It is a decibel [dB] in the sense of one-tenth of a bel, and the bel unit is too large for commercial use.
Since it is a value and difficult to write as is, decibels are usually used. Comparison of sound intensity (sound pressure level, SPL), power, etc., and attenuation amount, etc.
It is also used when expressing as a ratio. For any reference value A, the decibel value LB of B is LB = 10 log 10 ⁡ BA [d B]
{\displaystyle L_{B}=10\log _{10}{\frac {B}{A}}[dB]} Input of amplifiers such as operational amplifiers and
It is also used as a unit representing the output voltage ratio (gain), and is obtained by applying the following conversion formula. G = 20 log 10 ⁡ yx [ d
B ] {\displaystyle G=20\log _{10}{\frac {y}{x}}[dB]} (However, G: input/output ratio converted to decibel x: input,
y: output) Since the square of the voltage ratio is the power ratio, if the previous definition of the power ratio is rewritten as the voltage ratio, the coefficient of logarithm becomes 2 times 20. The difference between input and output is
This method is used because it can have a wide range, from values close to 0 to numbers as large as 1 million. Power is voltage (or current)
Since it is proportional to the square, a voltage (current) ratio of 10 times becomes a power ratio of 100 times, and when expressed in decibels, it becomes 20dB. About the sound pressure level
same. The sound pressure level and vibration acceleration level are defined and expressed based on sound pressure (Pa) and vibration acceleration (m/s²), respectively.
It is a quantity (absolute decibel). The attenuation of electromagnetic waves is expressed in decibels (relative decibel).