Organ pipes are the musical instrument which are used for producing musical sound by blowing air into the pipe. Longitudinal stationary waves are formed on account of superimposition of incident and reflected longitudinal waves. (i) In closed organ pipe only odd harmonic are present.

Explanation: when two identical longitudinal waves travelling in opposite directions overlap, a longitudinal stationary wave is formed. thus, the waves produced in organ pipes are longitudinal stationary waves.

Organ pipes An organ pipe closed at one end can allow standing waves which have a node (zero displacement) at that end and an antinode (maximum displacement) at the other (neglecting a small ‘end correction’).

The closed pipes are kept open from one end and closed on the other hand, similarly the open pipes are kept open from both the ends. The stationary waves in these pipes are formed by the reflection and the superimposition of the incident sound waves. Let L be the length of the organ pipe and v be the velocity of sound.

The organ pipe in which one end is opened and another end is closed is called organ pipe. Bottle, whistle, etc. are examples of closed organ pipe.

Open organ pipe is the one in which both ends are opened and then sound is passed through it. Closed organ pipe is the one in which only one end is open and the other is closed and then sound is passed.

Different Types Of Organ Pipes

• The Reed Pipes. A reed pipe creates sound thanks to the use of a vibrating reed that interrupts the flow of air through the pipe.
• The Regal Pipes. Similar to the reed pipe, these pipes use a resonator and reed to create a range of sound.
• The Diaphone.

Organ pipes are musical instruments which are used to produce musical sound by blowing air into the pipe. Organ pipes are two types (a) closed organ pipes, closed at one end (b) open organ pipe, open at both ends.

Sound produced by an open organ pipe is richer because it contains all harmonics and frequency of fundamental note in an open organ pipe is twice the fundamental frequency in a closed organ pipe of same legnth.

The cost of a pipe organ can be as low as $30,000.00 for a used instrument relocated to a new home, to millions of dollars for a new instrument built for a major church or concert hall. The range of cost for a pipe organ for a small to medium sized church is in the area of $200,000.00 – 850,000.00.

Organ pipes fall into one of four broad sound categories: principal, flute, string, and reed. The first three types are known as “flue” pipes and work like whistles. The majority of organ pipes are flue pipes.

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