Did I say that? No. There are always losses in an energy transfer and this is no (perpetual motion) exception. ddf | -----Original Message----- | From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On | Behalf Of David Ilvedson | Sent: May 08, 2009 10:36 PM | To: caut at ptg.org | Subject: Re: [CAUT] Accujust and grunting fish bait | | So the energy in the vibrating string is equal to the energy | of the vibrating soundboard? | | David Ilvedson, RPT | Pacifica, CA 94044 | | ----- Original message ---------------------------------------- | From: "Delwin D Fandrich" <del at fandrichpiano.com> | To: caut at ptg.org | Received: 5/8/2009 11:41:48 AM | Subject: Re: [CAUT] Accujust and grunting fish bait | | | >David, | | >The sound created by the strings is not made louder by the | soundboard. | >The sound we hear coming from the soundboard is fresh new sound. | | >Yes, the mechanical vibrations along the string do create a minute | >amount of sound--as can be expected given the string's | minute surface | >area. You can hear this sound if you make a single-note model and | >strike a taut string (or a set of | >strings) pulled to some appropriate tension. But this sound | created by | >the strings is very weak. | | >It is not until the strings are coupled in some manner to a | >soundboard--typically through a bridge--and those mechanical | vibrations | >are able to physically move soundboard that the bulk of the sound we | >hear coming from the piano is created. This sound is created by the | >soundboard. It is not the sound created by the string that has been | >amplified--it is all new sound. Technically one could say that the | >sound created by the soundboard is added to that created by | the strings | >but the amount of sound created by the strings is so small | it is usually ignored. | | >ddf | | >| -----Original Message----- | >| From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] | On Behalf Of | >| David Love | >| Sent: May 08, 2009 6:46 AM | >| To: caut at ptg.org | >| Subject: Re: [CAUT] Accujust and grunting fish bait | >| | >| OK agreed that people should understand the concepts and | express them | >| clearly but while transducer does describe the function of the | >| soundboard assembly converting one form of energy to another, it | >| doesn't describe the phenomenon of that the sound is made louder. | | | |
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