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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: How does loudness fall with distance from speaker? posted by ph5y on June 10, 2016 at 06:52:25:
The answer depends on the directivity index of the speaker and the room acoustics.
Basically, if you are far from the speaker then the reverberant field of the room predominates and the sound does not change with distance. Close to the speaker it falls with the inverse square of the distance. In a typical home environment, the transition from near to far is around 1 meter. If I recall correctly, it is more like 10-20 meters in a concert hall - but there is a LOT of variation between halls.
All the above calculations are different at different frequencies; it is quite common to do the calculations for each octave.
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Follow Ups
- RE: How does loudness fall with distance from speaker? - Paul Joppa 13:26:48 06/10/16 (1)
- Critical distance ? - djk 17:43:30 06/10/16 (0)
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