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If 'better' requires a human assessment, it suffers from bias. If "better" can be reduced to merely the absolute measurement against a universally accepted scale, then the comparison can be objective. Therefore, 1 decibel can be objectively compared with 4 decibels. "Too loud" is entirely subjective and cannot be assessed without bias. So you could compare the results objectively by measuring signal:noise ratios or some other absolute measurement but whether that measurement means that the equipment is "better" is not necessarily objective unless everyone agrees on what type of measurement result IS better.
surely the reference point would be the object that is being replaced. -- bas. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html