Q3: Can a box with air pressure peaks dampen sound energy peaks?

In summary, the conversation discusses four simple systems, two involving loudspeakers and two involving air fans, and their ability to lower the peak amplitude of energy in the system. The comparison is made to a muffler on an automobile engine. The question is posed of which box is the most restrictive in terms of pressure and which is the best at lowering amplitude. It is also questioned if the comparison between pressure and sound energy is valid.
  • #1
kach22i
51
0
Attached is an image of four simple systems, two are loudspeakers, two are air fans.

My goal here is to examine if any of these "boxes" do anything to lower the peak amplitude of the energy in the system and which does it better and why.

................

Q1: Imagine the loudspeaker generates a real low and then a real high frequency sound pressure wave.

1a. Which box muffles/dampens/attentuates the extremes better?

................

Q2: Imagine the fan varies it's speed to generate real low and then a real high air flows which then result in low and high pressure waves.

2a. Which box muffles/dampens/attentuates the extremes better?

................
 

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  • #2
silencer does the same thing for the engine
 
  • #3
ank_gl said:
silencer does the same thing for the engine
Yes, an automobile engine produces noise and the flow of hot gases, so a muffler is an excellent comparison.

As mufflers vary from the straight flow-through type typicaly found on aircraft to the more restrictive type designed to provide a measured level of back-pressure for proper operating, there is a lot to choose from.

Looking again at the four diagrams, if we were rate them from least restrictive to most restrictive from a "pressure" stand point and then rate them in order of lowering the "amplitude" (sound and or pressure) would they be in the same order every time?

Which one first?

Which one last?

Why?
 
  • #4
Suppose you cannot compare the sound energy and pressure energy in the four mechanicl boxes at all.
In case of the pressure energy of air pumped by fan, if there is a peak of pressrue from the fan, the air inside the box absorbes the addtiional energy by increasing the pressure which is to be released again later. In case of sound energy, if there is a peak of sound energy from the speaker, I do not see any media in the box that can absorbe the additional energy and release it again later.
 

1. How does dampening air pressure peaks affect performance?

Dampening air pressure peaks can improve performance by reducing fluctuations in air pressure, resulting in a more stable and consistent flow of air. This can lead to better control and more precise measurements in experiments or industrial processes.

2. What are the common methods for dampening air pressure peaks?

Some common methods for dampening air pressure peaks include using dampeners or pulsation dampeners, installing pressure regulators, and implementing pressure relief valves. These methods work by absorbing, regulating, or releasing excess air pressure to maintain a steady flow.

3. Can dampening air pressure peaks prevent equipment damage?

Yes, dampening air pressure peaks can prevent equipment damage by reducing stress on the equipment caused by sudden or excessive pressure changes. This is especially important for sensitive equipment or systems that operate at high pressures.

4. Is it necessary to dampen air pressure peaks in all applications?

No, it is not necessary to dampen air pressure peaks in all applications. It is typically only necessary in applications where precise control of air pressure is critical, such as in scientific experiments, industrial processes, or medical equipment. In other applications, such as household appliances, the air pressure fluctuations may not have a significant impact on performance.

5. Are there any potential drawbacks to dampening air pressure peaks?

One potential drawback of dampening air pressure peaks is that it can increase the complexity and cost of the system. Additionally, in some cases, dampening air pressure peaks may also decrease the overall flow rate or efficiency of the system. It is important to carefully consider the benefits and drawbacks before implementing dampening methods.

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