pendulums

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From: Mark Lawton (markslawton@hotmail.com)
Date: Wed Nov 12 2003 - 11:42:41 PST 

From: "Mark Lawton" <markslawton@hotmail.com>
Subject: pendulums
Date: Wed, 12 Nov 2003 11:42:41 -0800
Message-ID: <BAY7-F54ntxdOGCJLgR0004fb3d@hotmail.com>

One idea that comes to mind regarding music and pendulums follows:

The student could measure the height of the pendulum versus time and record
the data using a CBL. The graph of the data will be a sine wave with
diminishing amplitude.

Multiple that graph by Sin(x) to put the frequency in the audible range.

Play the signal through the computer's sound system and you will hear a
single (musical) pitche.

The height of the pendulum corresponds to the volume and the length of the
string will correspond to the pitch of the note. Change the starting height
and change the string length for varying effects.

Swing multiple pendulums at the same time and one could make music (or at
least musical chords).

-Mark Lawton
Portland, OR

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