0
What approximate change in decibels does an observer experience from a sound source if the observer moves to a new location that is 67 percent as far from the source?
Wiki User
∙ 13y ago
We're not sure of the solution, so we'll post the work here, and let others
tear it apart:
Sound intensity is proportional to the inverse square of the distance from the source.
So the new sound intensity is ( 1/0.67 )2 times the original value.
db = 10 log(P2/P1) = 10 log (1/0.67)2 = 20 log (1/0.67) = -20 log (0.67) =
+3.479 dB
Check:
(all together now . . . everybody sing, dance, and wave your hands in the air)
That sounds about right . . . we know that 0.707 is 1/2 sqrt(2),
which would produce a change of 3 dB.
Wiki User
∙ 13y ago
The change in decibels experienced by the observer is approximately -6 dB. This is because the change in distance is inversely proportional to the change in intensity, which is logarithmically related to decibels. So, if the distance is decreased by 67%, the intensity (and therefore the decibel level) will decrease by about -6 dB.
Add your answer:
Earn +20 pts
How much does the observer cost?
The cost of an observer can vary depending on the location, experience level, and specific tasks required. Generally, observers may charge by the hour or by the day, and rates can range from a few hundred to several thousand dollars. It's recommended to discuss pricing with the observer directly to get an accurate quote for their services.
What will happen to the loudness if The distance between the source and the observer is doubled?
If the distance between the source and the observer is doubled, the loudness of the sound will decrease by about 6 decibels. This is because sound intensity decreases with the square of the distance from the source due to the spreading out of energy over a larger area as the distance increases.
What is location of an observer of motion?
The location of an observer of motion is typically described in terms of a reference frame. This frame can be stationary or in motion itself, and serves as a point of reference to describe the position and movement of objects. Observers can be located at any point within this reference frame to study the motion of other objects relative to their own position.
What is a common frame of reference when you describe motion?
A common frame of reference when describing motion is the observer's point of view or a fixed point in the environment that is used as a reference to describe the motion of an object. This helps to establish direction, speed, and location of the object in relation to the observer or the fixed reference point.
Upon which frame of reference is time based?
Time is based on the frame of reference of an observer. Each observer may experience time differently based on their relative speed or gravitational forces. This concept is a fundamental aspect of Einstein's theory of relativity.
What could be the approximate location of an observer if he measured the altitude of Polaris to be 41 degrees above the horizon?
New York City.
At which location would an observer find the greatest force due to the earths gravity?
An observer would experience the greatest force due to Earth's gravity at its surface, which is closest to the center of the Earth and where the gravitational acceleration is strongest.
How much does the observer cost?
The cost of an observer can vary depending on the location, experience level, and specific tasks required. Generally, observers may charge by the hour or by the day, and rates can range from a few hundred to several thousand dollars. It's recommended to discuss pricing with the observer directly to get an accurate quote for their services.
Where on earths surface is the observer at location c located?
3
What two things where the constellations are seen in the sky?
The observer's location and the time of the year :)
What kind of tide does the observer experience when he is passes through tide bulge?
5
What two things determine where the constellations are seen in the sky?
The time of year and the observer's latitude determine where the constellations are seen in the sky. As the Earth orbits the Sun, different constellations become visible at different times of the year. Additionally, an observer's location on Earth's surface affects which constellations are visible due to the tilt of the Earth's axis.
What observer on the earth will experience when one star is going away from the earth?
increasing wavelength
Why is left and right not as useful as the cardinal directions when describing location?
Left and right describe direction in terms of the observer. In contrast, the cardinal directions are independent of the observer's position.
What will happen to the loudness if The distance between the source and the observer is doubled?
If the distance between the source and the observer is doubled, the loudness of the sound will decrease by about 6 decibels. This is because sound intensity decreases with the square of the distance from the source due to the spreading out of energy over a larger area as the distance increases.
At which new york location would an observer measure the highest altitude of polaris?
Plattesburg;)
What is visable on the celestial sphere directly above the observer?
The point just overhead is called the zenith. The objects visible at that point depend on the date, the time of day or night, and the observer's location.
