Page 9 - Sound Wave Module

Comparison of the above frequencies

4. Organ Pipe Phenomenon

an organ pipe is one of the sound-producing
elements in the form of an air column for example on

a flute, trumpet or piano. Organ pipes are divided
into open and closed organ pipes.

A. Open Organ Pipe

TONE WAVE EQUATIONS

If a 1/2 wave forms along the
organ pipe, the tone it
produces is called the
fundamental tone

L = ⁄ λ then λ = 2L

so that the fundamental tone
FUNDAMENTAL TONE frequency equation for an
open organ pipe

An organ pipe of length L
forms 1 wave where

L = 1 λ then λ = L

The frequency of the top note

FIRST UPPER TONE to 1 is