Sound Power Measurement
A frequently used method of estimating the sound power level at a source is to measure the sound pressure level at some distance, and solve for :
- If the source is in free space
or
- if the source is on the floor or on a wall, such that it radiates into a half sphere.
The sound power estimated this does not diminish or increase with distance, unless reflections are present.
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Famous quotes containing the words sound, power and/or measurement:
“America is a hurricane, and the only people who do not hear the sound are those fortunate if incredibly stupid and smug White Protestants who live in the center, in the serene eye of the big wind.”
—Norman Mailer (b. 1923)
“Tis not such lines as almost crack the stage
When Bajazet begins to rage;
Nor a tall metphor in the bombast way,
Nor the dry chips of short-lunged Seneca.
Nor upon all things to obtrude
And force some odd similitude.
What is it then, which like the power divine
We only can by negatives define?”
—Abraham Cowley (16181667)
“Thats the great danger of sectarian opinions, they always accept the formulas of past events as useful for the measurement of future events and they never are, if you have high standards of accuracy.”
—John Dos Passos (18961970)