Enter the distance from the noise source and the source level in decibels (dB) into the calculator to determine the noise level at that distance. This calculator helps in understanding how sound levels decrease with distance.
Ktb Noise Formula
The following formula is used to calculate the noise level at a certain distance from the source.
NL = SL - 20 * log10(D)
Variables:
- NL is the noise level at the specified distance (dB)
- SL is the source level or the initial noise level at the source (dB)
- D is the distance from the noise source (meters)
To calculate the noise level at a certain distance, subtract 20 times the logarithm (base 10) of the distance from the source level. This calculation is based on the inverse square law for sound propagation in an ideal free field.
What is Ktb Noise?
Ktb noise, or Keyhole Transfer Beam noise, is a term used to describe the sound level at a certain distance from a noise source. It is a concept used in acoustics to understand how sound intensity decreases as it travels away from its source. The Ktb noise level is important for noise control and management, especially in urban planning, construction, and environmental studies.
How to Calculate Ktb Noise?
The following steps outline how to calculate the Ktb Noise Level.
- First, determine the source level (SL) in decibels (dB).
- Next, determine the distance from the noise source (D) in meters.
- Next, gather the formula from above = NL = SL – 20 * log10(D).
- Finally, calculate the Ktb Noise Level (NL) in decibels (dB).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
source level (SL) = 100 dB
distance from the noise source (D) = 10 meters
