How far do decibels travel?
The effective distance of a 100 dB(A) sounder in a very noisy environment is 1.8m, the distance for a 120 dB(A) sounder is approx 18m (10 times the distance).
How does dB change with distance?
For every doubling of distance, the sound level reduces by 6 decibels (dB), (e.g. moving from 10 to 20 metres away from a sound source).
How far does 140 dB travel?
The jet plane, 140dB at 50m, would be 170dB at 1m-ish, working the math the opposite direction. The plane is audible outdoors (70dB) out to roughly 50km (again, off by a doubling or two). You can easily hear a passing jetliner at 30-50k feet plus some horizontal distance (10-20km).
Which is more powerful 0 dB or 20 dB?
On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB.
What’s the maximum distance for a DB9 cable?
They are also called RS-232, although that term usually refers to DB9 specifically. All of these have a maximum individual length of 15 meters (slightly over 49 feet). Extension cords can be used but past the 15-meter length, the signal will start to degrade. At 30 meters, the signal will have half the normal strength.
How big can a 100 dB sound be?
The strength of the source is undetermined. 100 dB could mean the sound power level Lw= 100 dB re 1 pW, or it could mean the sound pressure level Lp= 100 dB re 20 microPascal, at 1 m distance, or 10 m or … Even if the distance were given, the (unknown) size of the source can play a significant role.
How to calculate sound level in dB calculator?
The sound level drops by 6dB when you double the distance to the sound source. 10 times the distance drops the sound level by 20dB. Enter 3 values and the calculator will calculate the 4th value for you. L = sound level in db or dBA, d = distance in m (meter) or ft (feet).