Hello Researchers,
does the noise emission efficiency of a structure depend on natural frequency of the structure? will lowering the natural frequency of the structure lead to less noise generation? please answer or guide me to a correct source to know about this one.
Thanks in advance
~Aanand
Hi Aanand,
You might find some helpful information about radiation efficiency and radiation modes in this paper:
Article Radiation modes and the active control of sound power
Best,
G.
Does the noise emission efficiency of a structure depend on natural frequency of the structure?
Yes, if an external excitation frequency is equivalent to a natural frequency of the structure resonance will occur. This can generate a tonal acoustic response in the surrounding environment.
Will lowering the natural frequency of the structure lead to less noise generation?
Possibly. This will depend on the specifics of the application. If lowering the natural frequency eliminates resonance, then it will eliminate the tonal acoustic response. However, lowering all of the frequencies may lead to resonance of another mode formerly higher than the excitation frequency.
Hi Aanand
Here is a good book on the subject. It covers not only plates, cylinders for infinite structures but also finite structures.
https://www.amazon.co.uk/Sound-Structural-Vibration-Radiation-Transmission/dp/0122476719/ref=sr_1_7?ie=UTF8&qid=1542059867&sr=8-7&keywords=frank+fahy
Sincerely
Claes
- Badges
- Science topic
- Similar topics
- Correction