Here's my point Richard, the subject line has nothing to do with the subject of the message. It would sure help if it did. Bud > > Meine Frage: How much difference is between those and the custom made > plugs? > >Short answer hit the keys harder and you can hear the >unisons. > >Long answer; no one should tune a piano without plugs. If >USA OSHA knew the SPL (sound pressure level) the would >absolute forbid tuning without plugs. I personally have >measured SPL of 110 dB at ear level tuning the treble of a >Yamaha C3. 115 dB is possible with some of those hard rock >hammers. > >100 dB exposure of 15 minutes is OSHA standard. Or there >abouts, I forget the number but it is far shorter than it >takes to tune the treble of but one piano. > >Get plugs, use them, and never leave home without them. > > Newton Bud Schwab W 6 Z Y P Malibu, california
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