I think you are forgetting how the Organ pipe sounds. Remember resonance. The air can flick in and out at any rate at all, but you only get resonance with specific frequencies (fundamental and overtones), so you only hear specific frequencies sounding.crd2830 said:Homework Statement
Organ pipe sound is driven by a compressed air jet flicking alternately in and out of the pipe in step with the fundamental frequency. My question is whether sound waves of the higher frequency harmonic series are emitted during the intervals when the jet is outside of the pipe and not contributing energy to the system, and if so, what drives them?
Thank you.
Homework Equations
The Attempt at a Solution
Not sure how you mean that. As I hinted, it flicks in and out at the rate it does for a reason. Understanding that reason is key to answering the question.PeterO said:The air can flick in and out at any rate at all,
Please try to answer my question in post #2, even though you do not yet see the relevance.crd2830 said:The question is the energy source to drive the harmonic frequencies. If the jet flicks in and out of the organ pipe, adding energy only while flicking into the pipe, and if the fundamental frequency of the pipe were 110 Hz, then during each second there are one hundred and ten 4.5 ms gaps during which energy is not being added to the pipe. But during those 4.5 ms gaps, harmonic sound waves are being generated. For example, to sustain the harmonic frequency of 1100 Hz requires an energy pulse inside the pipe every 0.9 ms. Where is that energy coming from during the aforementioned gaps?
No, the jet does not initiate these events by itself.crd2830 said:each compression/rarefaction event initiated by the jet to transit the length of the pipe.
An organ pipe sound source is a type of acoustic sound source that produces sound through the vibration of columns of air within a pipe. This type of sound source is commonly used in pipe organs found in churches and concert halls.
An organ pipe sound source produces sound through the vibration of air within a pipe. The air is set into motion by the flow of air from a bellows or an electric fan. As the air flows through the pipe, it causes the air column inside to vibrate, creating sound waves.
There are two main types of organ pipe sound sources: flue pipes and reed pipes. Flue pipes produce sound through the vibration of a column of air, while reed pipes produce sound through the vibration of a thin metal reed.
The sound produced by an organ pipe sound source is affected by several factors, including the size and shape of the pipe, the material it is made of, and the air pressure and flow rate. The pitch of the sound can also be adjusted by changing the length of the pipe or adding stops to alter the air column's effective length.
Organ pipe sound sources are primarily used in pipe organs for musical performances. They can also be found in some electronic instruments and used in scientific experiments to study acoustics and sound production. Additionally, they are used in some sound therapy practices for relaxation and meditation.