Solving Frequencies Problem: Lowest Tone in Close-End Pipe 200Hz

In summary, the frequency problem in a close-end pipe is the difficulty in determining the lowest tone due to the reflection of sound waves at the closed end. The length of the pipe directly affects the lowest tone produced, with longer pipes producing lower tones. The formula for calculating the lowest tone is f = 1/4L. This tone can be changed by altering the length of the pipe. The lowest tone in a close-end pipe has various real-world applications, including in musical instruments and HVAC systems.
  • #1
araw83
1
0
The lowest tone to resonate in a close-end pipe of length L is 200Hz. Which is of the following frequencies will not resonate in the pipe?

400Hz
600Hz
1000Hz
1400Hz

Anyone know where I should start on this?
 
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  • #2
I would start with the section in your text on pipes with closed ends.
 
  • #3
This is simple, just remember for one end closed.

Fundamental Frequency:

[tex] f_{1} = \frac{v}{4l} [/tex]

The rest of the frequencies will be given by

[tex] f_{n} = (2n-1)f_{1} ... n=1,2,3...[/tex]
 

FAQ: Solving Frequencies Problem: Lowest Tone in Close-End Pipe 200Hz

What is the frequency problem in a close-end pipe?

The frequency problem in a close-end pipe refers to the difficulty in determining the lowest tone or fundamental frequency that can be produced in the pipe. This is because the end of the pipe is closed, causing a reflection of the sound wave and resulting in a unique frequency pattern.

How does the length of the pipe affect the lowest tone produced?

The length of the pipe is directly related to the lowest tone produced. As the length of the pipe increases, the wavelength of the sound wave also increases, resulting in a lower frequency or tone. This means that a longer pipe will produce a lower tone compared to a shorter pipe.

What is the formula for calculating the lowest tone in a close-end pipe?

The formula for calculating the lowest tone in a close-end pipe is f = 1/4L, where f is the frequency and L is the length of the pipe. This formula applies to pipes that are closed at one end and open at the other end.

Can the lowest tone in a close-end pipe be changed?

Yes, the lowest tone in a close-end pipe can be changed by altering the length of the pipe. By decreasing the length of the pipe, the lowest tone will increase, and vice versa. This is because the length of the pipe directly affects the wavelength and frequency of the sound wave produced.

How is the lowest tone in a close-end pipe used in real-world applications?

The lowest tone in a close-end pipe is commonly used in musical instruments like flutes and organ pipes. It is also used in industries such as HVAC systems, where the length of pipes can be adjusted to produce specific frequencies for air flow and temperature control.

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