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In Reply to: Re: Check your log scale Math... posted by john curl on March 23, 1999 at 08:45:22:
John,I'm a working RF "Engineer" and I would never use only voltage to describe what has been described in these threads as potentially hearing a Signal to Noise relationship issue. This is, after all, the relationship of the Signal power to the Noise power, not just the Signal voltage to the Noise voltage. The Signal and the Noise both consist of voltages as well as currents, and the characteristic impedance of the transmission line (either interconnect or speaker wire) is the same for both.
I believe the issue is whether our ears will detect the difference of the S/N relationship in the energy transmitted by the ultimate transducer (speaker), which is of course a power issue and not a voltage issue. I find it interesting that at low level Audio Engineers will use one approach, and at the same time will employ a high level approach which in this case amounts to a difference in the S/N relationship of 100 times, in linear units. The power amplifier's gain is the only difference between the two levels, and it is clearly by design a very linear amplifier so that the S/N relationship should be virtually unchanged.
Maybe you meant to say "Audio Engineers", instead of just "Engineers", use 20 Log ()... If so, I then understand where Jon's approach is coming from.
Kind Regards, Chris
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Follow Ups
- I beg to disagree with this conceptual approach... - Chris Fagas 08:48:33 03/27/99 (2)
- Re: I beg to disagree with this conceptual approach... - john curl 13:59:10 03/28/99 (1)
- Indeed. - jj 09:36:29 03/29/99 (0)
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