Sound waves(The behavior of soundboards)

[Richard Brekne]

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To all interested parties:

Acceleration fundementals defined:

Accelerometers measure acceleration, vibration, and shock. An accelerometer
involves the mounting of a seismic mass attached to a damper and a spring inside a
solid casing. The movement of the mass inside the casing is proportional to the
force of acceleration on the device. Many accelerometers use either a capacitive
or piezoelectric sensor to measure the position of the mass. Accelerometers are
specified by the range, frequency response, and the sensitivity of the device.

  -- Acceleration, vibration, and shock:
     1. output units, mV/g
     2. seismic mass, damper, and spring
     3. second derivative of displacement
     4. capacitive (AC excitation)
     5. piezoelectric (charge amplifiers)
 -- Range, frequency response, sensitivity

taken from
http://zone.ni.com/devzone/conceptd.nsf/webmain/

John Delacour wrote:

> At 1:47 AM -0800 12/19/01, Robin Hufford wrote:
> >In the interests of  amicable discussion I would have to say however that
> >as the members of this list are at least able to operate computers and are,
> >evidently, literate, it is not likely  they misconstrue what an
> >accelerometer is
> >or what it can do although in point of fact the  motion itself is not what is
> >measured but rather the time rate of change of velocity...
>
> I'm afraid, Robin, that likelihood is very real indeed!  It really
> does appear that they think it is measuring bodily movement,
> fantastic though you and I find that.
>
> JD




--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html


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