In a message dated 5/5/98 12:56:08 AM Central Daylight Time, ilvey@a.crl.com writes: << > For the sake of perspective, > raising the lid on a grand makes 1db difference. > Steve > Yamaha Only one db? I would have thought more! David Ilvedson, RPT >> I would have thought so too. One can obviously tell the difference whether the lid is open or closed. I seem to recall that it takes about 3 db to have a perceivable difference in volume. Maybe there is more to it than volume. There would be a difference in the higher harmonics. If volume is being measured, is it over the entire spectrum or a sampled amount in the middle? If the latter, then louder and higher harmonics must be more than just 1 db difference. Although I have no way of proving the difference caster cups make, my ears tell me there is a difference. I wouldn't consider having a piano up on a hotel platform without some support under it. I wonder why Del doesn't think this concept has anything to do with reality? Bill Bremmer RPT Madison, Wisconsin
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