All Questions
9 questions
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String vibration dimensions
We're all familiar with the typical diagrams of standing waves of a string, as in this image from Wikipedia:
The thing that bothers me is that they ignore the reality that the string is vibrating in ...
- 11
4
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0
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85
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Identifying speech sounds from sound waves [duplicate]
TLDR: How do we differentiate, say, a "A" from a "O", how do we identify speech sounds? If formants are the key, how is it possible to identify it regardless of the pitch (...
- 968
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2
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641
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During sympathetic resonance in a piano, are new frequencies generated?
Sympathetic resonance in a piano is the phenomenon of one string being excited, transmitting its sound to other strings that will then start vibrating if they have common frequencies.
For example C2 ...
- 3,256
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2k
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Resonant frequencies in organ pipes
I have a series of doubts regarding the principle of organ pipes. For a given length of closed organ pipe there are various modes of vibration for the standing waves.I dont know if this is silly but ...
- 1,113
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990
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Where do pure tones occur in nature, besides harmonics?
When you sound a tuning fork, you hear an pure tone/sine wave of usually 440Hz. Yesterday, I tried hitting a table knife made entirely from stainless steel against a grapefruit. When I held it up to ...
- 21
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Are These Guitar Strings Demonstrating Subharmonics?
This video has a fair few instances where there is an exaggerated wiggling of the guitar strings. I rationalise this by saying its a similar effect to rotoscoping, like where wheels appear to spin ...
- 826
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1k
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How many natural frequencies does a beam have?
If you take a real 3D beam, how many natural frequencies does it have? Likewise, how many natural frequencies does a beam have if it's a one dimensional, like an Euler beam?
- 11
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Harmonics and the frequencies
Let's say we had a pipe which was closed on one side and open on the other. We can find the wavelength for the first harmonic. To find the second harmonic we just add one more antinode and find a new ...
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resonance frequency [closed]
A string has a mass per unit length of 9 10–3 kg/m. What must be the tension in the string if its second harmonic has the same frequency as the second resonance mode of a 2m long pipe open at one end? ...
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