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If I say: Level of a helicopter = 130 dB, most people are content.
Laymen think that a specific decibel value belongs to a noise source. Like heavy truck = 100 dB, jackhammer = 110 dB, rock band 120 dB. That is not correct.
Alway is forgotten that the distance from the sound source to the measuring point plays an important role. Sound level decreases by (−)6 dB per doubling of distance from the source. Without any distance a dB value is really nonsense.
Wiki User
∙ 12y ago
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Is The decibel is a unit of pitch?
No. A decibel is one tenth of a bel. The decibel is a logarithmic unit of measurement that expresses the magnitude of a physical quantity relative to a specified reference level. It is a dimensionless unit, because it expresses a ratio of two quantities with the same unit.
What is the normal decibel of a human voice?
The decibel level for standard human voices is around 60 decibels, which is also the level for singing birds. Hearing loss occurs at around 110 decibels with painful hearing loss occurring at 130 decibels.
Info a submarine is 294 feet below sea level A helicopter is flying directly over the submarine 1277 feet above sea level what is the distance from the helicopter to the submarine?
If we have 294 + 1277 here, it will equal 1571 feet. The reference is sea level, and the submarine is 294 feet below it. As the helicopter is at 1277, by adding 294 and 1277, we get the distance between the sub and the chopper, which is 1571 feet.
One decibel is equal to in bel?
One decibel (dB) is equal to one tenth of a bel (B).
What is the decibel of a chainsaw?
The sound pressure level in decibels depends on the distance to the chainsaw. In 1 m distance we can get 110 dB. In 10 meters distance we get 90 dB. So keep off the noise maker.
When was Doctor Decibel created?
Doctor Decibel was created in 1986.
When was Miss Decibel created?
Miss Decibel was created in 1987.
What does a decibel have to do with sound?
A decibel is the unit of measuring the level of sound.
What is the decibel of a car horn?
What is the decibel level of a car horn?
When was DeciBel Research Inc. created?
DeciBel Research Inc. was created in 2002.
What is the decibel level of a Sikorsky CH-3C helicopter?
The vortex noise decibel level of Sikorsky CH 3C helicopter is calculated in different parameters of the five rotatory blade revolutions per minute (rpm),thrust,sound pressure level (SPL),angular velocity radians per second, etc.At 183 rpm at 13400 pound thrust it is 78 db,for 20,500 pound trust it is 82 db. Similarly at 213 rpm rotor speed at 20000 pound thrust the noise level is 83 db.
What is an non acceptable decibel level?
Decibel level over and above 120-15 is considered dangerous for the humans.
What is the noise or decibel level of crowing rooster?
A crowing rooster can have a crow that is upwards of a decibel level of 70. This can be comparable to the decimal level of a raised human voice.
What is Decibel level?
A unit used to measure the intensity of a sound or the power level of an electrical signal. Someones voice could raise by a decibel.
Average decibel level of human conversational speech?
Scroll down to related links and look at "Decibel Sound Pressure Level Examples".
What is the highest decibel level a rat can emit?
The decibel level of a rat depends on the measurig distance to the rat. The closer you are to the mouth of the rat the louder the noise you can measure will be.
What decibel level is dangerous?
They have terrible teeth in their terrible jaws. Just like the Gruffalo.
