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In Reply to: Re: "This is completely wrong" posted by Drew Eckhardt on March 9, 2007 at 13:50:51:
Actually, you also need to include the speakers directivity index. Both directivity index and reverberation time (Rt60) are functions of frequency. And even then, the appropriate formula gives a statistical probability, not a precise prediction. And the statistics inslude the assumption there are many overlapping room modes - which is not true below a few hundred Hz in most listening rooms.Given all those complexities, I generally assume the 1-meter anechoic sensitivity or efficiency applies to the listening position,. All the variations get lumped in with the listener's preferences for loudness, preferred music, variations in how compressed recordings may be, etc. etc. Usually if you can make 102dB at full power at 1 meter, you will be happy with the available loudness - though you are probably listening at 82dB on the sound level meter with "slow" response. This does not apply to those who want a rock cencert in the home - they will need another 10 to 20dB, and a good otolaryngologist to fit their hearing aids later. :^)
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- Re: "This is completely wrong" - Paul Joppa 14:36:55 03/09/07 (0)
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