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Author Question: What are the noise criteria curves? What will be an ideal ... (Read 59 times)

penguins

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on: Jul 26, 2018
What are the noise criteria curves?
 
  What will be an ideal response?

Question 2

What is the difference between black iron and galvanized iron pipe?
 
  What will be an ideal response?


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adf223

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Reply #1 on: Jul 26, 2018
Answer to Question 1

The industry uses a noise criteria system to designate the level of noise in the area where by the registers will be used. Each NC curve is assigned a number, in 5 decibel increments. The number corresponds to the decibel reading at approximately 1500 Hz.

Answer to Question 2

Black iron is the natural iron finish. Galvanized is dipped in zinc to make it more resistant to corrosion.


penguins

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Reply #2 on: Jul 26, 2018
Both answers were spot on, thank you once again


adf223

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Reply #3 on: Jul 26, 2018
Great! Please up vote :D


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