20 reputation
15
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location Gothenburg, Sweden
age 27
visits member for 2 years, 2 months
seen Jun 17 '13 at 8:11

hi I have just started studying sound and vibrations. I have a background in mechanical engineering. I am finding it difficult to understand the basics at my university. I believe I can find some help here and also to be aware of the newest developments in the field.


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accepted Orthogonality of modes
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comment Orthogonality of modes
@user17581,@daaxix,@thatnerd thanks a lot
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comment Orthogonality of modes
It get the concept now. One more query. While doing the expansion of h(r) is it convolution that you have used ??
Jan
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comment Orthogonality of modes
@user17581,@daaxix If I am getting it right then it means that if two modes are orthogonal then there are independent of each others?They individually contribute to the energy of the whole system ?
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asked Orthogonality of modes
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accepted Fundamental frequency , wavelength and the length?
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comment Fundamental frequency , wavelength and the length?
Thanks a ton . it helps now
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comment Fundamental frequency , wavelength and the length?
In case of a rectangular room , is it so that the node corresponding to first fundamental will be at the center of the room. If so then how ?
Sep
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comment Fundamental frequency , wavelength and the length?
Thanks a lot . It presents a clear picture now. So can it be generalized that for a wave in closed structure the λ corresponding to fundamental will always be the length of wavelength between two nodes and hence λ=2L and for a structure open at one end it will be between a crest and a node λ=4L. And if we have both ends open then should it be the one corresponding to two consecutive nodes ?
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comment Fundamental frequency , wavelength and the length?
Thanks for your answer but I have some doubts.I am not able to understand when you say " sin(πx/L) has periodicity Δx=2L, and the periodicity of the wave is what we call the wavelength, so λ=2L" .I understand that it is just another way of saying that the time period is 2 pi . Why is that we need to have one half wave as the one corresponding to fundamental frequency.
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asked Fundamental frequency , wavelength and the length?
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comment Eigen modes in a room
Thanks for the link. I just have the idea but I am not able to get it completely. How is it done ? I am looking for the method and the concept behind it.
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asked Eigen modes in a room