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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: I don't know if this is what you are looking for, but.... posted by DevillEars on March 9, 2007 at 10:02:23:
>The dB peak listening level = (x+y)-5(z-1)This is completely wrong
1) You're listening in a reverberant space and probably far beyond the critical distance at which direct and reverberant sound field presures equal.
For typical speakers in a typical room this happens at 2-4'. Going farther does not result in an appreciable volume decrease.
2) If you were in an open field, sound presure from point sources drops with the square of distance which is to say output decrease in decibels is 20 log distance in meters compared to the output at 1 meter. Going from 1 meter to 2 is 6dB, 1 meter to 4 12dB, etc.
Line source loss is proportional distance so the number would be 10 log distance.
You need to work with room volume and Rt60 to get a meaningful number.
See http://www.linkwitzlab.com/rooms.htm#C2
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Follow Ups
- Re: I don't know if this is what you are looking for, but.... - Drew Eckhardt 11:35:49 03/09/07 (3)
- Re: "This is completely wrong" - DevillEars 12:21:23 03/09/07 (2)
- Re: "This is completely wrong" - Drew Eckhardt 13:50:51 03/09/07 (1)
- Re: "This is completely wrong" - Paul Joppa 14:36:55 03/09/07 (0)
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