Open-Ended Pipe How can this make noise? -hit with a mallet -blow into one end

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# Open-Ended Pipe How can this make noise? -hit with a mallet -blow into one end - PowerPoint PPT Presentation

Open-Ended Pipe How can this make noise? -hit with a mallet -blow into one end Both ends of the pipe will vibrate. A vibrating section of a material is an antinode . The length between two antinodes is ___ λ . Thus, L = ½ λ. 1/2. Two types of open-ended pipes:.

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Presentation Transcript

Open-Ended Pipe

How can this make noise?

-hit with a mallet

-blow into one end

Both ends of the pipe will vibrate.

A vibrating section of a material is an

antinode.

The length between two antinodes is ___ λ.

Thus, L = ½ λ

1/2

Two types of open-ended pipes:

Different pipe length = Different frequencies

When the holes are covered, air

Comes out of the end – long wavelength

When a hole is open, air escapes there

Close-Ended Pipe

How can this make noise?

-hit with a mallet

-blow across the top

The closed end will not vibrate. This is a node.

The open end will vibrate. This is an antinode.

The length between a node and a antinode is ___ λ.

Thus, L = ¼ λ

1/4

String

How can this make noise?

-pluck

The ends of the string are fixed. These are nodes.

The center of the string will vibrate. This is an antinode.

The length between two nodes is ___ λ.

Thus, L = ½ λ

1/2