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previous: Eric H Dale,you've got a couple of... -- 4/20/2000 8:29 AM

Re: SPL [sound pressure level] question

4/20/2000 8:55 PM
Doc	Re: SPL [sound pressure level] question Those SPL/efficiency ratings @1watt electrical input are measured on axis at a distance of 1 meter, using a test frequency of 1khz. They don't quote the figure at the speaker's natural resonant frequency, at 100hz, or 3500hz, etc. I was under the impression that 6db increase in measured sound pressure level was double the perceived loudness. db=20log(SPL), so divide 6db by 20, which is 0.3, then 10 to the 0.3 power is 2, so twice as loud. Also, 4 drivers which are identical to a single driver will double the volume (SPL) of that single driver using the same electrical input.

4/20/2000 8:55 PM

Doc

Re: SPL [sound pressure level] question

Those SPL/efficiency ratings @1watt electrical input are measured on axis at a distance of 1 meter, using a test frequency of 1khz. They don't quote the figure at the speaker's natural resonant frequency, at 100hz, or 3500hz, etc.

I was under the impression that 6db increase in measured sound pressure level was double the perceived loudness. db=20log(SPL), so divide 6db by 20, which is 0.3, then 10 to the 0.3 power is 2, so twice as loud. Also, 4 drivers which are identical to a single driver will double the volume (SPL) of that single driver using the same electrical input.

Replies:

Doc Gentlemen, I apologize for the slop... -- 4/21/2000 6:47 PM