[CAUT] Semantics

[Keith Roberts]

Correct me if I'm wrong but wouldn't a longintudinal wave be a sound type of
wave, only in a different medium? It has speed that can be measured and
reflects off of things.

When something vibrates it is because it is under tension and fixed with a
flexible center or end so it wants to return to center. This can happen on a
cellular or fiber level as in a block of wood.

Keith Roberts



On Wed, May 13, 2009 at 6:11 AM, Keith Roberts <keithspiano at gmail.com>wrote:

>
>
>  On Tue, May 12, 2009 at 10:21 AM, <afmamh7 at bellsouth.net> wrote:
>
>> I am not an acoustician, but I think it is incorrect to consider sound and
>> vibration as two different types of energy.  Sound IS vibration.
>>
>>
>
>> Sound is not vibration. Sound is an impulse that is a wave of air. It
>> leaves from it's point of origin and never goes back unless acted upon by
>> another force. It is confusing that it does have frequency and amplitude.
>> Take the wave pattern caused by dropping a rock in a pond. The resultant
>> waves have direction, amplitude and frequency but we don't call it
>> vibration. Sound originates from a point source and disperses in the same
>> manner as the water waves do.
>
>
>
>> In vibration, the energy returns and crosses the center line of origin.
>> Back and forth motion is vibration.
>
>
> Keith Roberts
>
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